Refund not forthcoming, giving up on Vodacom's integrity

I had a data contract which expired end of August. I paid for this via EFT at R253 pm and did not immediately realise the contract was finished and had changed to a lower month to month fee of R69 (Vodacom is very quickly on your case if you owe them money, but not bothered if you overpay of course) When I realised this in Oct after I made another R253 payment - I immediately called the call center and cancelled the contract. I checked on the MYVodacom website and saw on the statement that my contract was not cancelled and asked for contact via the MY Vodacom website, which never happened. The Call Center is ALWAYS a frustration. I ended up calling the call center again and went through the whole saga AGAIN, AGAIN I was assured that they will cancel the contract and back date it to my first call, I have overpaid by R184 and this is the refund I want. Conveniently Vodacom keeps "missing" or forgetting to cancel the contract, thus using up my credit in their monthly charges of the month to month. I thought my last call sorted this out finally, but alas, I still have not received any refund at all. Vodacom has swallowed up my R184. I now have no more hope that I will get my money back so this serves as a warning to others. Make a calendar note of when your contracts are due to finish.