Vodacom is a Terrible service provider

Last year my contract came to an end and I followed the necessary procedures to call in and cancel 1 month in advance. That was August 2020, the consultant that assisted me did not do their job and forgot to cancel the actual contract which resulted in me being debited monthly each time I call in to cancel I get promised that the issue is resolved however there has been no progress until November 2020 in which I called in again and the consultant finally sent me the cancellation emails. Regardless of this I am still being debited though, it's ridiculous that I am paying for a service that I am not using, the SIM card has been ******, this is affecting my credit score and I am still being debited. I have spoken to so many people from vodacom and the first thing they want to do is offer me a new contract yet they are yet to cancel the previous one. I am at my wits end. This is probably the worst experience I have ever had with a network provider.