Special advertised for something that is out of stock

I went to Tops at Ruimsig at 19:51pm on 20/02/18 and there was a special on Russian Bear vodka with 2 (440ml) plays and when we got to the till we were advised that the plays (440ml)did not arrive in the stock, why does Tops advertise something and then when you buy it you are advised that it is out of stock and never arrived on their deliveries, i find it to be highly unacceptable that they would keep the advert there, That is called false advertising and now i have to find myself buying the vodka for R109.99 where as i could have bought it for R119.00 with the plays, i do not appreciate such and I not impressed, I love buying at tops but if this is how you treat your customers it isn't the place to shop.