Vodacom taking money which does not belong to them!!

<p> On 1/2/2017 vodacom upgraded my package from a Smart S to a Smart L without my authorisation. After multiple complaints and phone calls vodacom reversed my package back to a Smart S. Needless to say that my billing was incorrect because of the unauthorised change. I have been trying to get a credit note out of vodacom for the past month. Phone call after phone call, complaint after complaint, reference number after reference number.........nobody gets back to me and nobody corrects my account. Vodacom is happy to take money off my bank account which doesnt belong to them but when it comes to giving it back there is no help or response from them! I am furious at Vodacom and the lack of service I have received from them! I will be cancelling my contract with vodacom! I would not recommend their services to anyone!</p>