Rude manager refused to account for the incorrect

On Saturday the 25th of April at about 11h45, I went to the game stores in jabulani mall. I got to your shelves and saw that the 5l Fruittree juice was R22.95. I then took 3 of them, to my surprise when I got to the till it scanned R65.95, I then told the cashier that I had took 3 because it was R22.95, cashier then called supervisor Lebo to come and help me, lebo then said we should go check on the shelve and indeed it was labelled as R22.95. When Lebo (supervisor) then approached the Sales Manager Patrick to tell him about the incorrect pricing. He BLATENDLY said he will not give it to me at that price and it is not his problem. I explained countless times that it is his people that were so negligent to put the incorrect pricing and not my problem. This is totally unacceptable for a manager not to take responsibility for his employees actions. This is contravening with a section in the consumer protection act. Game must compensate me on the loss and frustration I received from their untrained rude manager Patrick.