Incorrectly debited my bank account for a Data sim I did not request

Cell C does not care about their clients anymore, I have been in contact with them from January 2023 and it is now the 3rd of April 2023. I have called several times and every time they just say at the Call Centre that they will come back to me. Some agent has wrongfully issued a sim contract on my *** number and has been debited me ever since. The debits were done wrongfully and without my consent, and the last debit was on the 1st of April 2023. They do not come back to me and they do not reply to my emails. Nobody at Cell C takes responsibility for their actions. It does not matter how many times I call. The Management Team does not exist at all. The only time and only one time, they called me on a Sunday, please who calls a client on a Sunday, I really do not appreciate it. The guy just said, they will request the voice recording of December 2022. Now who can take nearly 4 months to try and listen to voice messages. I do not have any confidence with Cell C and will most definitely not renew any of my two contracts with them ever again. I have also called the Call Centre and notified them that they must call me with feedback, on my main cell number ***. Nothing happened............. Now who treats a client like this, I ask, I have been a client of theirs for many, many years, and this is how I get treated, this is **********?!