2 litre coldrink advertised on tv

Yesterday evening on tv, Game stores advertised assorted cold drinks which included Schweppes, fanta and sprite at R49.00 . Today I went to Game in hammanskraal to buy only to find there is no special on those coldrinks, it was only coke in bundle for R48. The lady at the store kept telling me that head office has been notified but there is no feedback as yet. Still there is no sign of apology in the store to say maybe it was an error. I'm so disappointed wth game store.