Cell C is wrongfully distorying my name

I took a data contract with cell c which was never properly adressed, i billed incorrectly. When i addressed the matter with the cell c i was told the matter was addressed which was not the case. I had my both my cellular and data contracts suspended and was list by cell c on the credit bureau. I have proof that the cell c gateway store made a mistake with my contract but when I go to the store to address the matter the store manager gives me the run around and avoids listening to me. <br> Being wrongfully listed on the credit bureau has damaged my name and business. The store manager keeps saying he'll call me back but never does as I want them to correct the mess his store and cell c have made