Specials' Shortages

A while back Game had a special on Satiskin products (3 for the price of R.....) but game Vincent did not have stock. when asking staff they did not seem interested but just said that they did not have stock of those products. Then yesterday we went to Game in Retail park to buy the Bobtail special, but NO boxes of the gravy available but plenty dogfood. Surely if Game offers a special they should make sure that they distribute enough of the product for several 100 customers and not just for a select few??