Standard Bank Failing to close my Revolving Credit and Charging me Interest Daily

I called Standard bank in the 19th of August requesting a revolving credit settlement amount, the consultant over the phone was able to give me the amount in which I then payed it in full. There after I requested for the revolving credit account to be closed and a payed up letter, the consultant assured me that he will put instructions and by the 22nd my account will be closed and I will receive the letter via email. I then relaxed, the 22nd of August passed and nothing happened, I was a bit relaxed because in the app the loan balance was R00. Today when I woke up I saw that standard bank charged me R66.48 interest on the account, I quickly rushed to the branco at Mall at carnival and I was helped by a lady(choosing not to disclose the name). The lady told me that I need to pay the charged interest so that the account Can be closed, i then told her that that’s is not my fault,I spend a lot of money on airtime and called the consultants, they reassured me that the account will be closed but nothing happened. She then printed a paper and told me to sign( the paper was for the account to be closed), she underlined that she will wait for the branch manager to instruct her in what to as she was not available. She took my numbers and assured me that my account will be closed and they will bebo need to come to the bank and stand on long ques. Unfortunately as I write this message I have not received any call from anyone, my account in my app is still active, now the question is when will my account be closed and who will pay the interest because it won’t be me.

I will glad appreciate if someone from standard bank can contact me and close the account *** and send me a payed up letter on my email.