Foldover saga

Never in my life have been so embarrassed and al because a lousy cashier decided to keep my Foldover which I paid over. I decided to go to the restaurant again today and raised it with the manager. They requested for a slip which I didn't have the. I had to show them my bank details where it clearly shows the transaction and still I was told that they needed the actual receipt even after I gave them the date of purchase. McDonald's Maponya is a disgrace together with they so called managers