Dissapearing Data

Over the Easter weekend I bought a 1GB data bundle for my Cell Phone. The day thereafter or the next I received a sms that my data bundle is low, I checked at it was between 200-300MB. I did not do updates as I make use of my Vodacom WiFi modem contract for this. I contacted customer care on 111. The lady was very helpful, although she experienced difficulties with the system. She said that there was no subscription deductions that will use data. She could only see iphone/apple's website and it might be updates on my phone that used my data. I checked and all auto update settings was disabled. I only ran the updates a day or two after I spoke to customer care, by using my wifi modem. <br> Please investigate if there is not errors on the system as the operator at the customer care experienced issues when trying to assist me in solving my issue. There is no way that almost 1GB of data can disappear like that.<br>