Vodacom non-cancellable contract

I reported ***** on my contract ( I***-3) when someone *****ulently renewed my contract. After a long struggle, Vodacom eventually reversed the amount charged to my account, however, Vodacom didn't reverse the contract dates. Instead of my contract expiring in June 2023, the contract has been extended without my approval. I called the call centre to terminate, and I was told to go to the Vodacom store which I did but I was not assisted. They continue to bill me for a service I don't want. I refuse to pay for a service, I didn't sign up for. Vodacom have send HP attorneys (HP***)