Vodacom de*****ing customers

Vodacom upgraded a secondary number that I cancelled, on inquiry of my increased bill, they could not explain.<br> After 10 months I found the upgrade on the secondary number.I informed them, submitted the required documents, which they conveniently lost. though I had proof off receipt. I submitted again two weeks before the invoice date. They **********ly billed me again. Its been a month now, they still have not return the funds to me.<br> They also do not respond to emails, never answer the help numbers. All branch staff at both Southdale and Rosebank are only competent enough call the \head office"/ \""tradepartner\""/\""accounts\"""