Data Gone

I loaded 250mb just today after my bundles got depleted and in less than 2 hours I got an sms saying I have 5mb left of data. Without understanding how this could have happened I called and the lady I spoke to couldn't give me a reason as to where or what it got finished on. I have never been so irritates especially for the fact that this is the first this happens to me. She said to login and I'll be able to see where I spent it on. I did and only to find there's no such thing. I am so mad right now. I know I use an iPhone 6 Plus and it takes data but I give permission on every update on my phone and close the tabs on my phone. So what good explanation does one have for me? That it eats up a lot of data? That is a seriously under thought response quite honestly. I would like this matter investigated and my data back in my account. The Tyler of phone I use has nothing to do with this. It's not my first time recharging so I need a proper calculated response Vodacom!<br> <br> Thanks