Cops won’t care because they can’t do anything about it. It’s not a crime they can prosecute.
You should instead talk to your landlord, who will tell you she can’t do anything about it, then call the ISP who *might* care.
Odds are you just need to change your ISP to something either they aren’t using or something that isn’t shared by the whole building. If you get internet from the landlord then you need to read the contract you signed and see they are in violation of the lease agreement.