Have you talked to the Super, or the building owner?
If that doesn't work, try some of the replies in this column from others in similar situations.
I can't help but t wonder if some things seems to be missing out your story.
Yes, I left details out about the other ridiculous things they have done. The fact is that my boyfriend and I worked our asses of every day, and usually fell alseep as soon as we got home, while those stupid fools stayed home day and night, and found nothing better to do than to make trouble.
I talked to our tenant many times, but he played dumb and acted like he knew nothing about my neighbors habits. I actually was forced to move out last week. When I came back after having that yard sale they left a gun box by their door, and for my safety I left. I guess they are on a lease and we weren't, so he has to cator to his need for money rather than the truth. They were pretty silly people.