Bad, bad service

Last week Thursday I puchses food at nando's Cape Gate. I paid with my card, payment went through as for some reason the manager reversed my oder. When I asked for my food he rep**** that I have to pay again, which I refused. He said that money should reflect in my account. 4 day later still no refund. I have contacted the complaints department 3 times, no joy. I contacted the head office and wanted to speak to the area manager. I was told that Marina, the area manager, would contact me. Once again no call for Marina or anyone from Nando's I am trying to find out why the nanager reversed the transaction, no one can help. When will I get my money.