Bank incompetance now my ITC black listing

I had closed ALL my accounts in person with Standard Bank in Sept 2014 via one of their branches. I paid up all the monies owed / settled all accounts with zero balance. 6 months later I get notified that my Credit Card account had been handed over to Brooks Luyt Attorneys. After contacting SBSA Credit Card I foud out that the Credit Card account was never closed, SBSA admitted their mistake but never delivered on their promise to rectify the mistake and clear my name from ITC or the law firm. I also contacted Brooks & Luyt with similar levels of incompetence and apathy. I am not stuck with ITC black listing thanks to SBSA incompetence.