Trying to cancel a Vodacom account is impossible

My contract ended in September 2024, and continue to a month to month basis. I phoned 1 Oct to cancel everything. 30 Oct I phoned again to confirm 31 Oct will be my last payment, the lady said there is no cancellation on the system, and she will log the cancellation. Received the following email stating 31 Oct 2024 it will be effective. We have received your request to convert *** to pre-paid. It has been logged and will take effect on 2024-10-31 17:39:41. This morning data is loaded to that number, so I phoned again to query the cancellation. The person confirmed that there is a cancellation logged for end of November. And now I received that exact email stating the end date is Nov?????????????????????????????????? How can I just cancel this