Cashier, Supervisor and Manager robbing change

On 3/02/2015, visited Nandos Maitland, CPT, @ 20.30pm to buy festive meal, paid with 2xR100 notes, receipt reflected that I paid R150, queried with the cashier (Simonique) and the she insisted that I had paid with R150, this escalated into an embarrassing argument leading to her Supervisor coming and insisting that I had paid R150, Supervisor then suggested to check the cameras, she came back more convinced that I was in the wrong, insisting that she now has proof that the money produced was R100 note and R50 note. I insisted to view the camera footage but she said that I was not allowed access the back office, but her manager (Nicole) will try and print the stills or call the police. I obliged, after 30 mins, they then called the police, when they (police) arrived, the supervisor allowed access to the back office to view the footage.I was then called by the police officer to see for myself, when the manager zoomed in on the footage, it clearly showed me handing 2xR100 notes to the cashier, when they realized their error and that I was correct all along, they quickly refunded me with my R50 in the back office with no apology after all the embarrassment caused. CUSTOMERS BE WARNED