Will lose a client to make profit.

Pick n Pay has a special on the Saleti Brown Sugar 2kg at R21. 99. I was not aware of the special untill today. When I went to the store to request for the sugar and I was told there is not stock. I had then requested to speak to the store manager to ask if I can get it at the same price when they do have stock. He basically give me the middle finger. He told me "that when he orders stock that I cannot give it at the same price cause when he orders stock he won't get it discounted and I would have to pay the normal price. Keep in mind that I spend thousands of Rands at this store who doesn't want to keep a client happy or who doesn't have any customer service.