Capitec lack of service

MY DEBT REVIEW PAID UP MY CREDIT CARD ACCORDING TO THE CLOSING BALANCE DISCOUNTED LETTER FROM CAPITEC CREDIT CARD COLLECTION DEPT. I HAVE MADE NUMEROUS PHONE CALLS AND SENT NUMEROUS EMAILS AND THEY STILL SEND ME A STATEMENT WITH AN OUTSTANDING BALANCE OF THE DISCOUNT WHICH IS STILL NOT WRITTEN OFF. WHY CAN I NOT BE ASSISTED!