Vodacom Contract cancellation

On the 12 October, 29 October and 12th November I've phone the cancellation department for my contract that has finished on the 10th of October 2020 and told them i do not wish to continue with this contract and want my number on prepaid. I went to my nearest vodashop as well and they have also submitted a request for cancellation of my contract but yesterday vodacom has deducted money from my account again. Seems like they don't want to cancel my contract and keeps deducting money from my account every month