Games stores advertising some goods that they know are out of stock

Game together with other stores like Metro advertise goods that they know they don't have. Game advertised a SmartTab for R749, for the dates 25 April - 1 May 2018. I started on the 26th April at Menlyn Mall Game store and they said they don't have the tablet, I went to Wonderpark mall game store the same day, I was told the tablet is not in stock. I tried centurion, I was told the same thing. Finally I went to the Game store in Mokopane and I was told the same thing, that the tablet is not in stock. And the funny thing is, when you check on line they say this tablet is available at those stores. (The same thing with Makro). Game stores must stop false advertising. How can they advertise a good which is not available at their stores?