UPDATE - VODACOM DATA

I bought data for 250MG last night as well as airtime and within in 20 minutes I got notification that I had used up both and was out of usage! I called Vodacom and advised me that I used it to update software or upgrades on my phone:- 1. I didn't have the sign showing me that the phone is updating, 2. I didn't get notification for upgrades/update (I have notification to let me know of updates) 3. I have set my updates to be all done via WIFI connections so that don't use my own data. <br> Now with a notification not showing as well as my settings being set on WIFI updates/upgrades only why would phone auto update!!!<br> Vodacom mentioned that its not their fault and that its the phone and my settings - I need a detailed answer from both Vodacom &amp; Huawei as I find this unacceptable?!?!?!<br> I have had the phone for almost a year now and as said all updates are prompted - why would it all of a sudden change over night! <br> I need answers and I need my data and airtime back!!!