Data high-jacking

On the 17th of November 2017 I purchased 2Gig data on the Vodacom app. I was informed that I will get 4 Gig's for the promotion. At the time I received a SMS and Email confirming my transaction. By the 18th of November I still had 0 Gig's I called the call center and was informed that none shows. So I purchased 2 more Gig's on app as I was talking to the consultant. Again nothing showed, but I got a SMS and a email confirming the transaction. So now I have purchased 4+4 Gig's. The Lady escalated by problem and was kind enough to give me 500MB while I was waiting for monday's answer. By Monday afternoon Vodacom has not contacted me. So I called the call Center again. This time the man insisted that I must buy some more date. The more I tried to tell him but I have bought 4 + 4 Gigs the more he insists I must buy more. I will admit that I got very agitate and rude. In the end he said he will give me 1 Gig to work with while we what for Vodacom. Big was my shock to receive another sms and email stating that I purchased another 1 Gig and that was added to my bill. According to him I can not purchase data from app (so no data special) - What is the App use then? So now 1 gig's shows and 4 + 4 Gig's is still m.i.a. But if you want to get date the only way is the call center so that they do not have to double up as advertise. I paid for extra gig I clearly stated I do not wont, I want what I originally order on the app