Over 12gigs of data depleted in less than a month

<p>I have been on the phone with the customer care centre for over 2 hours and I keep getting transferred between departments because no one can help me! I phoned mtn on the 27th April because within 7 days 5gigs of data was depleted, they told me to go to istore which I did, all my settings were correct to preserve data and yet up to date another 12gigs of data had been depleted (15 May) I have requested a URL report so that mtn can investigate what has depleted the data yet if it's the networks fault I would only be credited my contractual amount? I need to wait 7 working days for this to be resolved and how much data will be deleted until some one who knows what they are doing sorts this out? When I had spoken to the accounts department for the 4th time, there was no management available to escalate the problem too!! I had always only used a maximum of 2gigs Data a month and then within a couple of days and LESS THAN A MONTH over 12 gigs gets depleted, all updates are done over wifi, so please don't even blame it on that! As a contractual customer of mtn for the past 8 years I really expect decent service but then again that even seems like to much to ask</p>