MISLED WITH THE 30GIG DATA PROMO

I upgraded on 26/10/2015, I was informed at the store(MTN HATFIELD) that the 30gigs lasts for 3 months limited to 10gigs pm for 3months. When signing the contract, it was read to me what each pays says and was told to sign which I did. When 14gigs was taken away from after 1 month I queried this and was told that the promo was for a month. I informed them that that was not the information I was given but Josh the manager of the store said there was no ways they could have told me that, now my question is: Where did I s**** feed this information from? Surely I did not sleep and dream of it! I have since beginning December been calling 808 to sort this out, I have requested 1 consultant ( Siphele) to lodge a complaint for me and also a Supervisor Linda Makholwa to do the same who now ignores my emails but had assured me she will keep me updated. Siphelele confirmed with me that it could have happened that the store gave me that promo info as that was the initial promo before it was changed to 1 month which then confirms I did not thumb suck this info, I am getting no feedback, the service of the consultants is nothing short of disgusting. I want my 14gigs I had left. ICASA is next!!