My brother and uncle want to take my grandfather's ashes from me and don't care I have legal rights to them.

I (18m) have been fighting for 2 months against my uncle slowly for my grandfather's ashes that I have and are legally mine because he wants to bury them despite it being against his wishes. The other thing is my grandmother passed away recently and she's going to be put with him. My grandfather was not biologically related to me but he raised me. My uncle is not biologically related to my grandmother and I was my grandmother's executor and sole inheritor and she was my grandfather's. My uncle started to setting to get lawyers involved about 2 weeks ago and was upset when I didn't tell him exactly what he wanted to hear. I spoke with my grandmothers lawyer at the start of this week and I am the only one with any claim to those ashes for both of them. Any lawyer would instantly tell them that. Tonight my brother has started saying the same stuff that my uncle was on how he's going to take the ashes from me and bury them saying it's not right for me to keep them despite that being what they wanted. They want them buried and they will be upon my death and if they want to visit the ashes they can come here to visit them. If they want somewhere public to visit them they can dedicate a bench to them at the park. My brother is stating that my grandfather wrote a wheel on a piece of paper which wouldn't have even worked anyways because it was not legally signed. My brother is also stating he will get lawyers involved and he's getting upset with me because I'm not giving him his way. I've already contacted the police and I'm waiting for them to contact me back to see if I'm able to use police support if need be. I will update when I have an update

Update one: sorry I haven't updated until now, I was busy trying to deal with a lot of stuff today and try and figure out what to do. Before I go into the update I want to thank everyone who has given their actual advice. Sadly I do not have enough money where I could afford to get a safety deposit box. My family knows I'm not rich by any means and that's why they threatening to be in lawyers, for those calling me entitled and saying just give them the ashes clearly you guys are not reading it because I explain it's a lot more difficult than that. My grandmother and grandfather wanted their ashes together and that is what I will plan on doing however my grandmother's wishes were to go to me and I decide what to do with them when I am ready. For those asking what I plan on doing with them I plan on keeping them wherever I live because at the end of the day they're home is with me. My brother does not love our grandmother as much as he used to and he's never loved her as much as I do and frankly same as my grandfather. My uncle stopped even coming to this town and speaking to any of the family in this town until about 6 months before my grandmother's death in which case he called her up. He had not been to my town until my grandmother was on her deathbed. He has come back multiple times since whether it be to bring out his family for stuff they've tried to do or trying to convince me to give him the ashes. For those saying that they will break into my apartment I have a doorbell camera I live on the 5th floor of a apartment building and they need to buzz in the main doors to get in or have a fall which I am the only one who has a fob. For those who have said give them some of the ashes my uncle happens to have a small arm with some of my grandfather's ashes already which he could always bury and just leave me alone with the woman who he's not related to and the person who she wants to be put with who was her husband for over 20 years and she was an amazing mother to him despite the fact that she was not his mother and that she didn't have to do that. Anyways on with the update. The police phone me this morning while I was asleep and left me a message stating that there is not really anything they can do about helping me keep the ashes because it's considered property and they don't get involved. At the moment the ashes are with my father which despite him knowing I want them back he is insisting on keeping them until sometime next week. I will fight my father to the nail on the down low until I get everything of mine that that man has and then I will go low contact with him because I cannot just cut him off cuz he is invited to events that I am invited to and he still lives with two of my siblings. I spoke with him about trying to get the ashes back today and he told me I could and the way he said it he had me scared to the point I phoned the police to try and get help. The police before they even helped me insisted on phoning him which just messes it over for me because he knows how to manipulate people and he was able to go back on what he told me please never even came to see the texts he sent me and according to him the cop was concerned I would try to do something to myself. After I spoke with the officer I spoke to my father who had at one point threatened to put me into a mental institution despite me not living with him and being an adult and also I have an adult protective worker with an agency which means there is no way he could have done that anyways. My father is a complete control freak and hates the fact I'm living by myself and hates the fact I do not agree with every word he says. I am hoping to have this emotional roller coaster done soon and I will update again in about a week or couple days depending on how long it takes for everything. In the meantime if you have questions ask them in the comments I will respond.