DISGUSTING & RUDE MANAGEMENT

I am disgusted with the Spar's Management - A price tag was placed with an incorrect product... But the description still said Avo so I took the 4 avo's labelled R17.99 only to get to the counter and it was rung at R39.99 so I said but your label says a different price and the lovely cashier walked over with me to go and get the label which was clearly R17.99 exactly where I go the avo's, she then had to call a manager to come and correct the price on the till only for the arrogant Manager called Casper to come and and tell me "DO YOU NOT READ THE LABELS" - Well answer to your question I said yes I do and it is labelled as AVO, does he not proceed to SAY that " IT IS EASY TO CHANGE A LABEL" so not only are you in the wrong but you are now implying I am a *****??????? You seriously need to get your "MANAGERS" customer service etiquette in order if he is going to be dealing with customers! The way he "attacked" me straight away without any questions is is DISGUSTING!! Can I please have a response to this or I will be taking things alot further! - Oh and just to add if I wanted to I could have bought the whole shelf of Avo's at the price of R39.99... It is the principle of the matter that really grinds my T*TS!!!