Deformation of character

Cell C has reported me to the credit bureau and I do not owe them any money. I have never been behind on a payment with them. Due to this I paid out my contract. How can a company, when you support them, undermine you in such away. I will NEVER do business with this company again and I do not recommend doing business with them again. I am trying to buy a house an this LIE has caused me to loss out on my dream home.