POOR Service! Vodacom *****s from me!

I called in the beginning of December 2020 to cancel a contract that had run its course and is now on a month to month billing. I was then already annoyed that I had to give 30 days notice and that I still had to pay until the end of January. I just got my statement. Guess what? I am still being billed for this contract! Apparently the cancellation request was not captured on the system. And now I have to give another 30 days notice. This is theft. I want the contract cancelled! Can someone from Vodacom please assist???!!! P.S, Your customer care call centre is *******!