Vodacom is bullying me to be in contract with them.

Vodacom clearly is bullying me to be on a contract with them since January the 13th 2021 i have been begging Vodacom to cancel my contract which finished around march 2020..After numerous attempts speaking to call centre agents i have not been assisted everytime i speak to one of them they tell me that within 24 to 48 hours i will be contacted but no luck this is very frustrating as iam unemployed can't afford to be in contract. I have not used that sim card since last year 2020 December i got an invoice saying iam owing R1050.38 which i paid in full at vodacom shop at the grove mall they still dont want to cancel my contract..now again iam getting invoices that the number in question is been credited with airtime which i dont know who uses it cause iam not. Today 17 February 2020 i tried calling vodacom regarding the status of the cancelation process they telling me that my number has been calling the customers care line too many times i can't get through if i have issues i must call a certain number which is gonna charge me R2 per minute. I am really fed up with vodacom after been with them for soo many years iam taking my business somewhere else thank you.