Pick n pay bhara liquor

Was at pick n pay bhara liquor to buy some for myself..wen i get there saw a PI price with a price of R19.00 6pack of Extreme ok I thought WOW so less let me take one..when im by the pay point ready to purchase the cashier that was helping me by the name of Nosisi said No it not selling by this price hence i saw PI price call out to R19.00 ..was ready to pay the amount they refused with fool force saying NO No No you not gona get it witb this price.even showed then that No i saw it with this price not my false but yours..Still i didnt get wat i saw to pay for