Vodacom - Amazon Cloud Services Depleting Data

In the past 1 week or so my data has depleted like crazy! at a fast rate. I have never used more than 5gig per month but my data finished in less than a week!I called Vodacom and they said they dont know what Amazon Cloud and refered me to Istore, who also said they dont know anything about Amazon Cloud and sent me back to Vodacom. I walked into a vodacom store and still could not be assisted. I have not purchased any data for 2 weeks as I fear of losing it all in one day! My Iphone back up is only enabled for when on wifi. I have no Amazon account so how am I losing so much data on this and at such a fast rate? On the Vodacom data manager it shows Amazon Cloud services. I googled and found apple is in partnership with Amazon cloud based services. VODACOM, I NEED ANSWERS ASAP!