Contract Cancelation

My data contract expired in August 2021 however I am still being billed for it, 3 months into my new data contract. I called in September, there was a story about benefits given while waiting for the new contract to be activated (things I did not ask for). At 4h40pm on 20 October 2021, I spent 37min on a call with an agent who told me the extra charge was because I did call to "cancel some of the services of the contract that expired in August 2021". On that call, I specifically and repeatedly, emphasize that I do not want anything other than the contract I am on...everything else must be canceled. Again this month my bill is higher than it is supposed to and I am being credited with service that are useless to me; services I specifically asked to have canceled; services that were meant to be canceled when the contract expired in Aug. Clearly MTN is not transparent and insists on robbing customers during a time where every cent counts. I can't even go to the nearest branch because that is the branch where I received misleading contractual terms and the worst attitudes from the sales lady who had sold me the contract. I'm tired and ready to take the matter to the ICASA