Vodacom Customer Complaint

My cellphone contract had come to an end with Vodacom several months ago. As I've learned in the past, you would need to provide a months notice when the contract expires. I fulfilled the necessary actions from my part and communicated on email to stop the debit order. However and to this day I am still trying to get Vodacom to refund my money for the extra deductions that still took place from my account. Every time I send an email, it is like starting the process all over again. Their service is beyond pathetic and I am now contemplating the CPA route. I am sure that many of you have experienced the same. Their usual response is 3-5 days in which it will be resolved but it has been almost 6 months trying to get any form of closure to this problem.