Over charging/Incompetency/Bad service

Two weeks ago I made an order at McDonald's Jabulani Mall and the double charged my meal. The lady assured me it will be reversed the same night or the day after. I asked her if it doesn't reverse what should i do? she said i should come to there. I went back the next day as she said, she was not there. the supervisor who was there requested my bank statement in order to help, i did that immediately...gave me another story about contacting head office, I cooperated. Went back the following day with no contact received and they took my bank statement and cellphone numbers. Few days later on Wednesday, I receive a requesting my bank card number so they can transfer my money. The lady advise she will process on Friday since she wont be in on Thursday. A week has passed no money has been received/ transferred to me yet. A total of R178 and petrol it took for the days I had to go back and forth to they're store.