Charged incorrect bank charges with no assistance to resolve it

I am so frustrated at the poor service despite numerous calls to have my query resolved and acknowledgement of the error on their end with a promise to have it resolved and someone contact me back, however no one comes back to me and its still not fix. I had a Discovery bank account which I closed in 2022 Oct and the account was not owing anything. I opened a new Discovery bank account in March this year and immediately my debit card was on negative as I was charged bank fees for all the months Nov 2022 to Feb 2023 when I didnt have an active Discovery bank account. I have called the call centre, spent so much airtime on the calls to resolve this and I get confirmation all the time that they see the error and it will be resolved and someone will call me back to confirm once its done, then it goes quiet for weeks thereafter. I call again and follow up and its the same song and dance. So frustrating.