An update to this. The good news is that the constant pounding has stopped, but only after it escalated. The apt management didn't do anything, and refused to get involved. We kept covering all our bases and writing them letters with all the times she was harassing us. Then like 2 weeks ago, it was 8pm on a Friday night. We had just gotten in from dinner, our apartment was absolutely silent and she started pounding on her ceiling screaming at us to shut up. She was right below me, just screaming and pounding for a good 5 minutes and was following me around. My husband had enough, and called the police. The police came out, and she wouldn't answer her door, must have thought it was my husband, so the officer pounded on her door and yelled "police". He came back up and told us she was pounding on her ceiling because she can hear "people living" above her. He told her that if he has to come out again, we can file harassment charges against her.
So, that pretty much stopped that part. Her downstairs neighbor saw me out with the dog the next morning and thanked me, because she was getting to that point herself. We told the office management what had happened, and they kept apologizing to us and have been really nice since, but that really doesn't excuse them for not doing anything about the situation.
Fast forward to now, we had a little hiccup with getting our home loan approved, and are working on cleaning up some credit stuff. That's been stressful enough, but what's worse is the lunatic downstairs has decided to do other weird things. Now she stares through her window at us whenever we are outside. Just stands there and stares. And when we come up the stairs, she has opened her apartment door a crack and glare at us until we passed by. It's insane.
And now she has someone staying with her, this older guy, and they are so loud and I'm not sure if they are doing it on purpose. She screamed at my husband's coworkers through the floor when they came over, yet she can have someone over and scream and yell and leave her tv on until 2am?
Nevertheless, I've stopped trying to tiptoe around the around. I really can't wait to get out of here.