You need to know how the mold got there. Was it there when you moved in? If yes, then the landlord needs to clean it.
Is it rising damp? If yes, then the landlord needs to fix it as it can make you sick.
Yes you need to get a receipt or what is your proof that you paid the rent
Find new people, and make sure you don't talk about anyone and then you are a shining example of how a person act to others, You can only change the word at one so let it begin with ME
