Nandos refusing to pay back my money!

About 3 weeks ago I made an order on the Nandos app, once order was approved and money deducted from my bank acc I then realized I had chosen the wrong Nandos and delivery was going to be made to my work and not where I live. I quickly called the nandos Centurion explaining what I had done and asked if there was a way to transfer the order to another Nandos near me which would have been the one in Menlyn. I was advised that it is'nt possible and the only solution from their side was to cancel my order and I start over with the Menlyn restaurant. I then asked what would happen to my money when they cancel my order and I was told I would be getting refunded within 7 days. Today it's 3 weeks later and I have heard nothing or received my money back. The manager who goes by the name Joe was really great at trying to assit me and he send all my details, refund request form and confirmation of my bank account to what I assume is the head office to process my refund, the persons who were emailed from Nandos to process refund are Kerri Schroeder, Nokuthula mabuya, Nkosinathi Gcinisa and Khosi Mbatha. Not one of them reverted back or even confirmed receipt of email. About a week and a half later I reached out to Joe and copied the same people asking for a follow up update on my request. Joe was the only person that got back to me and he once again tried to reach the above persons mentioned to please assist in refunding me and unfortunatley till this day not a word from them. Maybe it seems like a little money to them and they don't care to attend to my request but I actually need that R252, nothing is for free and I'd hate to believe that nandos is *****ing money from their customers. I honestly would just like my money back please, this is utterly shameful and disrespectful especially to a customer who continously supports this restaurant