I got scammed

Hello,
Today I sold an item worth 700K to someone from Jiji, I sent the item with a Safe Boda delivery with instructions to the driver to not leave the buyer, but of course, he did.
I called this buyer like a million times and now he turned off his phone, I have his phone number 0747259975.
What is the recommendation for what I should do? Will the police be able to help or am I just wasting my time now.