False Advertising

I received a sms from meat world springs to advise that the Biltong is on sale for R119per kg, no where does it state that its only for the Safari Biltong. I went to Meat World on Saterday and asked can i please get 4kg of Sweet Chili biltong on special...Got it and paid fot it...At home i only noticed that they charged me R159.99 per kg. So i phoned them Monday morning and all they can say is sorry they will advise the clerks that they should advise the clients that the special is only for the Safari Biltong. Im now out of pocket because i had to buy for family and friends.This is false advertising. I would expect a refund for the diffrence and in future that they put on the sms what biltong qualifies for the speical.