Unfair listing with Credit Bureau

I have settled my contract account last year, around October last year and I have requested a settlement letter, which was issued to me by Sibongile Mnguni. According to the consultant I jut spoke to, the system doesn't show what the R144 is for, and she further indicated that it is the legal department that is now handling the account. To my surprise, I realised this afternoon that MTN says I owe them R144, for which I have been listed with the credit bureau. According to the consultant I just spoke to, the system doesn't show what the R144 is for, and she further indicated that it is the legal department that is now handling the account. How does one get listed before they are made aware of the intention to list? I am sure if I were made aware of the charges, and it's a fair invoice, I would have made means to settle it. R144 is not worth this. I have been with MTN for the longest time of my life, and this experience has taught me a lesson that some companies do not deserve loyalty. the listing with Trans Union is unfair, and my name must be cleared immediately. Unfortunately, the credit bureau companies do not verify the information that they receive from companies like MTN This is affecting my credit score; I cannot borrow from any financial institution because of this. It is disappointing and painful.

I want nothing to do with MTN, and I would like to advise people to check their credit information regularly