Rigged data

So I went to a telkom store at Mall of africa took a contract phone on Friday. Didn't use my phone at all on that day because I even thought of not taking out a phone anymore due to the bad customer service I received from telkom, anyway that's a story for another day. The problem is I supposedly used up 10gigs of data between today namely Saturday and Sunday. 10 Gigs when I call your customer service department I was told that even in the early hours of the morning I was using up 6 gigs when I was sleeping and had my data switched off even. So my thing is no normal 10 gigs of data can finish in 2 days. I've been buying data and never have one ever seen such. Telkom please fix this as my contract is only a few days old and already I've experienced so many problems with you guys. If you don't want to lose a customer do not treat me like I'm some clueless person who doesn't know anything about data.