Unethical and unprofessional conduct

I entered into a rental agreement with Bianca properties in March 2019, they were meant to manage the property and tenant. First issue is that their monthly fee kept increasing and on a monthly basis and they are unable to explain this. Secondly I have been requesting a signed lease agreement which I still haven’t received. Thirdly, “contract” ended in March 2020 but the rental deposit still hasn’t been paid and I have been dealing with a Michel Tshepe, who has been of no help at all. She has been promising to resolve this matter since June 2019.