Rental increase dispute

I would like to complain about this company, they offer rentals around Durban Bluff to be precise. The problem is ever since I moved to this flat the issues I have raised with them have never been resolved. Rent increase is due from the month of November and I have disputed the matter. Instead of listening to my complaints I was threatened that I need to leave the premises. Have tried getting in touch with the KZN Rental and housing tribunal but the information seem not to be working. Please advise on how do I go about resolving this issue, and when I exercise my rights threats are been thrown at me to leave the premises. How do I lodge a complaint to the tribunal?