Rude Cashier at pick n pay Jackal Creek corner

I was at pick n pay Jackal Creek corner ,I bought 2 inhouse white bread and 2 Avocados at fruit and veg I was told that 2 Avocados us R15.00 but when I get to the till it was different price of ,R20.00 I have explained to the cashier that the price is wrong ,the cashier by the name of ***aza N ***aza did not even entertain my story she was rude and just said it is minused on the till and there is nothing she can do then serve the other customers who wished to serve before me a car guard ,as a customer I feel so sad about her attitude towards me and I expect pick n pay to be the biggest supermarket in the country and should train their cashiers on how to behave towards their customers