Hello, guys. Thanks everyone for your great advice.
yesterday after work we came to the building, check the locks again, and ... went to precinct. There we explained the whole situation. At the precinct they told us go back to the building and call 911. This is what we did. Police came in about 3-5 minutes. They went to talk to super, who was not home, but his wife was.
She told them that he is fishing with his father ( 6pm Thursday outside raining cats and dogs). Ok, fine, they told her give the new key to tenants, she said they did not paid. You know the whole 9 yards. To make the story short she finally found the key and gave it to cops. So we were able to get to the apartment. Today I talked to the attorneys. They told me yes I can sue LL for illegal eviction, but it will take enormous amount of time and money. Actually it is not my intention, I do not need their blood, I want them to leave me alone.
This Saturday we are going to remove what was left in the apartment, clean it a little, take a lot of pictures and return the key.
I have a question, I have wallpaper in kitchen, does wallpaper considered as damage and they can get money for wallpaper removal? Another question, I had a leak under the windows when it is raining, is it my damage??? The same to the leak from apartment upstairs????
Thanks alot, Angela.