Double billed - NO REFUND

I visited KFC Randfontein on 30 June 2015 at 18:03. I went through the drive through. I charged my card. The transaction was approved and went through for the amount of R161.70, but the machine did not print a slip/receipt. According to the notice in the window if this happens your order is free. She then charged my card again and it was again approved this time I received a receipt. she advised that because it was double charged for the same amount it would automatically reverse the one payment. When I got home I phoned the branch and spoke to the manager whom advised that it would take 48 hours to reverse the payment. a week went by and still nothing. I phoned the call center number given on the slip 4 July 2015 spoke to someone and they said that someone will contact me. I received a sms with the reference number for my case CAS-124718-S9R5D3. again was advised that someone will contact me within 48 hours. It is now 14th July still no response from anyone and no refund has been made.