Contract Cancellation

My Vodacom contract ended in October 2023 but they are still deducting money from my account. I went to a store to try and cancel it and was told to call a certain number that helps with cancellations. I did make a call and a consultant tried to help me with the cancellation but he couldn’t find no record to show that the contract is still in place but yet they are still deducting money from my account. This is affecting my credit profile.