Closed Account causing Bad Credit Rating

I closed my credit card account in 2013, which still appears on my profile and is still accruing interest and charges to my detriment. This affected my credit rating negatively at a time when I needed to have the clean record I thought I had. I thought I had eventually sorted out this matter with the CDM department (after a very frustrating and unhelpful journey with all involved at SB) and was called and emailed by Standard Bank assuring me the credit bureaux's had been advised to update the information on my credit profile. On request of my latest credit report, 8 months later, I am happy to say NOTHING was done by Standard Bank and I am now worse off than I was before as far as my credit score goes. Trying to get hold of anyone that can assist is IMPOSSIBLE at best. I have all the paperwork to back up my claims and nowhere to send it to. I am finished with this financial institution and will seek legal advise for damages to my now irreversible financial profile thanks to Standard Bank of South Afirca.