********** charges & no response from call centre complaints

I really am not sure where exactly to get help with Vodacom. Vodacom has linked a random prepaid number to my contract account and no matter how many calls i log, i am still being charged for charges incurred by this number. November bill charges for this #********** number is almost R4000. Vodacom, i have logged yet another call with your customer service tonight, who again assured me that your backoffice would resolve this, should this money go off as a debit order on the 1st and not be resolved, i will be opening a case of #***** at the police station against you and instructing my bank to reverse the charges. Surely you take these problems seriously? I have been on your network for almost 15 years so perhaps you need to start looking after your customers? #daylight*******