Cancelled contract

Hi. I've posted here earlier this mont re cancelling my contracts. Within two days Vodacom contacted me and processed cancellation and said all in order and contract is now cancelled. Received a follow up call.afterwards from Vodacom to confirm cancellation and apologized for poor service. Needless to say Vodacoms debit order rejected now as I made sure not enough money in that account!!!. Vodacom is the most useless Company ever. Send me a bill for my account which is linked to the cancelled one before you will see a cent from me again!!!!!