ULPT Request: Downstairs neighbor bangs loudly on our floor nightly

Every night, the guy who lives beneath us SLAMS on his ceiling/our floor whenever we or our cats move around. It’s getting to the point where it’s jolting me awake at night. The worst part is, he works for the apartment complex as the maintenance supervisor so he has access to our apartment. What can we do to get this guy to stop? We’ve told the complex about it and they refuse to do anything. Cops also say they can’t do anything.