Lost faith in telkom

In August 2022 I had to change my bank account for my monthly debit order. I was told that because my new account was less than 3 months old it could not be updated and I was told that I should make manual eft payments. I did this in September but then was still debited as well on my old bank account which rejected and I incurred a penalty for the rejection on my telkom account. I called again in October and the rejection fee was credited. The same thing however happened in October and November and rejection fees were added. I called again in December and only one of the rejection fees were credited but I was told that if the debit order is successful for December. I then allowed the debit order to go through but after a week had no response so I called again and was told that the rejection fee would not be credited. I requested a call back on numerous occasions from a manager and to date have not had a call back. I have been making manual payments every month as I cannot afford the additional penalty fees. After sending an email complaint, Facebook and going to a branch I have still not been assisted to have this resolved. This has impacted my credit profile and my ability to upgrade my contract. My accounts have been suspended leaving me unable to make outgoing calls. I have done all I can to try and resolve this and have now completely lost faith in telkom as a service provider. All I want is for the incorrect rejection fees to be removed so that I can allow the debit order to go through going forward. Please help.