Vodacom contract cancelation.

I have struggled with Vodacom Since September 15th 2020. I logged a call to cancel a data contract. I was billed again in October and I called again on October 23 and October 29 2020 to cancel. On 2 November 2020 I called again and asked to be refunded for the months I paid after canceling I was assured someone from Vodacom would call me. I have been billed every month since then. I loggad a call today on the 7th of January 2020 to cancel my contract. Vodacom does not allow me to cancel a contact in store and as such I am at the mercy of a call center. I will be canceling my other contract with Vodacom. I feel that I have been treated in a dishonest and unfair way. Additional charges that were never explained to me have also crept into my account. I would appreciate a response on this matter on this public forum from Vodacom.