Discount marked but did not want to sell

On Saturday 24 October 2015, I wanted to purchase two Noritake dinnersets that was on a spesial offer for R267.00 when I got to the till to pay they didn't want to sell it for the prices that was on the boxes. They contacted the owner of Binuns , Errol and he refuse to sell it for the special offer price. While I was busy talking to the manager the cashier pulled of the special offer prices on both boxes. The owner Errol was very arrogant and told me I don't know what I'm talking about , and that I am very naive to think that he could sell a Noritake dinnerset for R267.00 and that he can only sell it to me for R 699.00 per set.