Bought a data bundle on friday,still not received

I bought a 1Gb bundle on Friday that's passed. I meant to put it on once off but instead it went off on month to month. Phoned in immediately and they confirmed it cant be reversed but it was cancelled for next month. I understood and all was good. At this point i had a bundle of 448MB which accumulated from last month. I was told by the call centre agent once the current bundle is used up the 1GB will be loaded. My bundle was used up yesterday and i am yet to receive my 1GB instead my airtime balance is being deducted for all the data charges. I phoned in again today and the call centre agent tells me the bundle has been used up and I need to buy a new one. Excuse me!! Then after arguing she says to pull itemised billing for detailed use! No I am not paying for itemised billing. This is a Vodacom issue You guys sort it out and credit my account with the 1GB i will need to pay on my next bill. I refuse to pay for something i have not received and for you people to complete a investigation!!