6 months in an apartment and never given my key for my mailbox, what should I do?

I've moved into this place about 6 months ago and when I got the keys to the place I was never given the key for my mailbox. All the while I've been frequently contacting my landlord about getting my key and there's always an excuse on why they aren't able to. I understand life happens and things come up but it's been too long at this point and I need my mail.

I've already contacted canada post and they cannot do anything as it's an older building so it's not their mailbox.

Any ideas on what I can do about this situation?