will not be paying again as this is the employee's fault

I decided a while ago that I wanted to change banks. I opened a Discovery Bank Account and have been using this for months already. I have tried to close my standard bank current account on more than one occasion. I am told this is not something that can be done over the phone. I DO NOT understand this. Anyway, I visited the Canal Walk branch on 26 June 2020 to close this account for good and was told that I cannot do this since the account was in arrears due to Standard Bank charging me bank charges on an account I am not even using. The consultant at enquiries advised me to lEFT an amount into the bank account and stated she would close the account the following day and Confirm this with me via email. It has been weeks now and still, I have not received this confirmation. The call centre confirmed that the account is still open and is now again in arrears because it was not closed when it was supposed to be.