False Advertising

So MTN did some Black Friday Specials. I bought 2 sim cards which cost R199 once off each. 1G anytime data and 1G night time data for 12 months. Doesn't work, came back to the Fourways store, they told me the sim card will only work in a router. NOWHERE on the pamphlet does it say that. It says sim only Pay as you go. This is nonsense, misrepresentation and false advertising! The consultant in the store is adamant the sims will only work on the router and the manager has disappeared