unhappy supervisor at checkers hyper-bad service

went to buy avos yesterday and they were in a tray labelled R7.99 , I get to the till point the price is R15.00 each avo. the cashier asked me to go show her were I got the avo as they have different prices. we got there I showed the cashier where I got the avos. when we got back to the till, she called the supervisor. who was so not friendly for a supervisor, she didn't greet and didn't want to listen to the story , she just came there and said if the system says they are R15.00 then I must pay R15.00.

I am very disappointed with the way Faith Tladi , of the 14th avenue Constantia Kloof -Roodepoort dealt the matter which I think it was unprofessional of her to act in a manner she did. I waited there for about 10min and she came with that bad service.