Misleading the people

Mtn's 2 for 1 deal was very misleading to say the least, the advert for the Huawei Y960 clearly showed that both phones got 100GB promotional data, but this has not been honoured. The agents and MTN wormed their way out of it. We were simply told that they could not answer for marketing. I have a pdf and hardcopy of the advert and intend to lay a complaint with the ASA. Sick and tired of being taken for a ride