Requesting refund

I'm so tired of Vodacom, all the calls that I had to make and going to the store to sort out an extra payment deducted from their side that hasn't been authorized. Since the beginning of the year they billed me an extra R209.65 for comp cell insurance that I did not ask for. After numerous calls and frustrating trips to the store it finally gets cancelled once I stopped my debit order. They expect me to continue paying every month but no refund as of yet for the money they stole out of my bank acc. How is this good service? Not acceptable! Now I can't even use my data even though I paid my account! Really? One problem after the other!