how can they do that

Good day.<br> <br> I went to game store Brits on Sunday 28 February 2016 and took out a new contract 2 for one 7\ smart tab 3G for R99 pmx24 the lady by game said I've been approved fill in the form's and got the tablets, then on Monday 29 February 2016 the lady by game phoned me and said i must come to game and bring the tablets and everything back she made a mistake and we have to fill in the form's from scratch, when i went back to game they took everything back and said i can only get one (1) tablet on that contract for R99 pmx24 how can they advertise 2 for one for R99 but i can only get one tablet i must still pay the same amount and that lady by game said i have been approved, i dont know is game or vodacom responsible for this, i as realy not satisfied with this.<br> <br> Regards<br> Gail Oberholzer<br> ***"