Vodacom Contracts Cancel issue

Hi I am trying for months now to cancel a contract that is over, it is now on a month to month basis. I dont use it at all but keep paying for it. I went to a Vodacom store, they cannot cancel it at store level and told me I must contact the contracts department, I called the department, spoke to the agent "got all his info", he confirmed that the contract is now cancelled and 3 months later it is still active? So I mails customer care last week Wednesday, no response from them 5 days later? I need help please! Regards Pikkie