Unauthorized contract

Someone from Cell C *****ulently reactivated my old Cell C contract in July 2023. I received a statement that they will debit my bank account R540 on last day of August. I called them to report that I never activated the contract and was advised to go nad make an affidavit at police station, send that statement and a copy of my ID which I did. This was on 07 August 2023. I requested the recording where I did commit to the contract and they did not send. They gave me a Reference number ***. My case is still not resolved. They then have the audacity to send me an email saying I took the contract with them, and it will expire in 2025. These people are debiting my account without my authorization, and I reverse it with charges. They then call to say I owe them. Cell C is a ****. I have run out of options as now this will affect my clean credit record; I will be labelled as a bad payer.