Please close account!!!!!

I have been on debt review for the past couple of years and I have since finished paying up my account. A letter was sent to Edgars on the 7th of August 2018, to confirm that the account was paid up and that the account should be closed but this was not done. I sent a follow up request myself on the 8th of August 2018 ,for the account to be closed but this was also not done. I went to Edgars Greenstone, where l spent over an hour, but I could not be assisted as the tellers could not get hold of anyone who could close the account. I tried calling myself and I was sent from pillar to post with no one helping me. The account was on a zero balance but to date its a hundred and something and its accumulating by the day. I need the account to be closed and that balance written off !!!!