I***-3 - contract cover where contracts was canceled

Extremely unhappy with the customer experience from vodacom. I canceled my contracts with them more than a year and every month I was still debited for contract cover of R6.08. I explicitly said whe. I canceled the contracts that I don't want anything from vodacom and numbers must rather be left on pre-paid. Then why am I still being charged for contract cover. I would like to have the call recording of the day I canceled the contracts and want to be reimbursed all the debit orders after the contract was canceled