Vodacom Poor Cancellation service and refund department

Apparently, when cancelling your phone contract you cannot do it at a cellphone branch which makes matters literally impossible to sort out. After trying multiple options to cancel my expired Vodacom contract and 2 extra months of payments going off on a defunct phone, Vodacom assistants finally contacted me. I then had to supply proof that I had cancelled it as they had no phone calls to trace so it seemed as if I had no tried. I then let them know that they never answered my calls so I when the automated route. Anyways, 2 more calls like that and finally it was agreed that my funds would be returned by a specific date. A month passed with no return, so I called again. I sent emails but due to my contract being cancelled I no longer have access to contact Vodacom assistants directly anymore, only a cell number supp**** with a full inbox. I emailed and the email addresses bounced back suddenly as if I had been blocked from getting through. Eventually someone called back to inform me that nothing was ever processed and that she would process it higher up. Anyways, It is on its way to 3 months now. I refuse to let this go on the principal that I am probably one of thousands of people being taken advantage by this system.