Credit was settled by there is a default.

My credit card Account was owing R24000 and it was handed over to Mac Robert attorneys. We reached an agreement with attorneys to pay a monthly amount of R2500. The attorneys offered a 20% discount and I agreed to settle the Account by paying the 80% of the total outstanding amount. The last payment was made on the 4th of November and I even received a settlement letter. My problem is the hat my ITC has a default of R582 noted as bad debt written off. This will obviously affect my about to obtain credit in the future and I want this listing to be cleared from Account. I called the attorneysystem his morning and they took me from pillar to post and no one is helping.