Response from Paul:
Jedar, I am sorry you had problems with the plumbing in the apartment. We later found that the drain was clogged and we clean it and now it is working fine. I would have appreciated that you were honest with me about the water leak as you said you didn't know anything about it when I asked you. The old lady was ringing the bell because water from your apartment was leaking into her apartment. I am concerned that there might be significant damage to the building from this. I am checking into the issue now.
Also, the heater works fine.
I am sorry you didn't enjoy your stay