Vodacom *********** and unable/unwilling to resolve my issue

I lodged a complaint with Vodacom about incorrect billing at the beginning of Oct. I got a reply on Hellopeter and also spoke to them telephonically. Following their response on my hellopeter review, I responded to them to ask when I could expect my refund (16 Oct). I have not heard anything from them since then. I once again contacted them telephonically (all the way from Europe) yesterday and was informed that the request for credit had actually not been processed and that someone would now act on it and that I should wait another 7 - 14 working days for the credit. Totally unacceptable...