R00.50 refund

I bought a pack of stir fry and a set of pots, the cashier asked me if I need plastic I sad yes. She gave me one, only to find out that the pot box does not fit so I asked for my refund they called the mng and when she got us she sad that how can the cashier call for R00.50 it is stupid and went on to say ' abanye abafazi bayalamba ' meaning that my wife she us starving. I sad to her even she can go to a Mercedes Benz to buy one if she is short with that R00.50 they won't give her there car in short she gave me bad attitude.