SHOCKING SERVICE FROM VODACOM

I upgraded my phone in January and asked them to cancel my device insurance that I had on my old phone and that I would not require device insurance as I was putting it on my personal insurance. I called EVERY month since January as EVERY month I received my bill and they continued to deduct despite telling me EVERY month that they had changed it on the system and would refund me. I do not understand why it is now MAY and yet I am billed again!!!! What does one have to do to get something sorted out right the first time. The incompetence is shocking!! How does a person carry on like this when they just deduct money off your debit order?? I tried cancelling my debit order and I cannot do that either! I use my airtime up holding on for hours on end to talk to someone!! This is unacceptable. People NEVER DO DEBIT ORDERS AT LEAST THAT WAY YOU HAVE CONTROL just some advice. And if you think someone will phone you back you are dreaming. Shocking service!!! Doesnt even deserve a 1 star. They also allow for 3rd part service providers to just use up your data and when complaining they have no means of protecting the client from these people who just go into your account and start charging daily for something you never accepted.