False Advertising

I visited Cell C head office store to upgrade my contract based on the advertised specials in the December booklet. I requested to take out the Huawei p8 lite bundled contract that comes with a 1gb data sim and an epic 100. The advertised special stated that i receive free 50gb anytime data that is valid for 90 days from activation. The cell C staff at the store collectively did not know how to activate both sims with the free 50gb data. I wasted over an hour at the store and was promised the matter would be resolved. He says i am the first person to take out that special. Surely that cannot be the case and even socell c staff do not know how to honour the specials. The advert clearly states that it is valid for 90 days from activation. I still do not have the 50gb and nelson insists he is getting information to fix it and needs more time. Why is it that nobody at the store or at head office knows what to do to fix it it in order to clearly give the customer what was clearly advertised? I still dont have the data that was promised. My reference number: *** has still not been resolved with nelly promising me feedback but not sorting out anything.