*****ing at the stores

On Friday 22nd my wife went to pay the electricity at Checkers Mayville mall Pretoria and she paid a R1000.00 from the debit card and gave the cashier R200.00 cash. When she got home she saw that only the R1000.00 was reflecting on the slip. She went back to confront the lady at the till but she was gone, she then went to the manager ( a white lady) the manager told her she can't do anything she ( my wife) must do what she want. If that is the type of managers they employ at their stores then it's no wonder the staff is *****ing money from their clients