Unhappy Client /Bad Service

I have been a Vodacom Client for years and never had a bad experience till recently. I paid up my contract in November last year and the money was allocated succesfully. Before my number was converted to prepaid I spoke to a consultant that tried to retain me as a valued member and offered me 10 gigs for R99 pm for both numbers. I was happy with the deal and decided I will take it. The deal was never activated, my number is now on prepaid however Vodacom has since debited my account every single month for no service rendered. I have made numerous calls to the call centre, staff that are *********** not knowing what to do and transferring me from the one to the other, it is ridiculous. Yesterday I asked for a Head Office number or to be transferred to a Manager I was cutt of. I have a budget for my debits and every time Vodacom debit my account *******y I have to request for reversals at my bank leaving me with a bad record and damaging my credit profile. I want this sorted. I want a letter stating I paid up my contracts in November and the money was allocated succesfully, however Vodacom ********ly went and debity account. Vodacom should stipulate in black and white that unauthorised debits wont happen again. I want to be reimbursd for my bank charges because every time I request a reversal it cost money. I think I will rather port my number to Telkom and take up deala with them in the future.... Vodacom is ridiculous and their staff is ***********!