Vodacom Contract Cancellation Nightmare

Totally disgusted in Vodacom, I cancelled my contract in March and got rid of the sim card in April only to find out that they are still deducting the monthly installment. I called them in July to cancel once again and advised that I will not be paying and will be stopping the debit order with immediate effect. I was advised that all was in order and that I can do so. Yesterday I log into transunion to check my credit score only to find that my vodacom account is in 60 days. Seriously? How many times do I have to cancel with these people to actually have my account cancelled. Disappointing service