MTN and Samsung false advertising

Samsung and MTN advertised that u get a VR Headset when u pre order a Samsung S7 as advertised. I made a pre order in the beginning of March 2016 so that I qualify for the headset and I confirmed it with the customer consultant. When They called me to collect my phone they said that the special is over and I dont qualify for it anymore. I pre booked my phone and headset. As advertised. How many people got **** to by MTN and Samsung. And while i was standing inside the store they where still advertising it on the tv screens instore. All a want is the deal I was promised....