Vodacom cancelation nightmare

As a pay as you go user, I attempted to cancel the debit order through the method staff had informed me was the way - to be told that I had to go about it a different way. After doing this, Vodacom continued to take the money off my account for the next number of months. There were no responses to mails to (again) cancel the debit order, and it has taken more than 16 months to sort out the credit and actually physically cancel the contract... And the dispute is still ongoing, after I have visited vodaworld multiple times. Pathetic customer service from Vodacom