False advertising/NO STOCK OF ADVERTISED PRODUCTS

Newcastle Mall Pick and pay.Advertises Specials on Products ,but no stock. Had Special on Stork Maragrine.Only had White Margarine under THE PICTURE OF Yellow Stork Bake.Purchesed by a child ,The white Margarine ,as that was the only one on thr shelf.Tried to exchange for the Yellow,the MANAGER REFUSED TO EXCHANGE.I think False advertising and not having stock.