Unhappy client

So i stayed at itemba for a few months then had to move out because i was relocating. While i was staying there i was asking for my contact daily but never received it. Then when i told them im moving out, they gave me and told me that i need to pay a fee and that i wont get my deposit money back. Okay but my question is now im suppose to pay them R11000 for a flat where someone already stays in. Ithemba properties is a place where they **** people.