What happened to my data?

<p>On Friday morning, the 27th of May, I checked my data balance on my 3G number *** via the Vodacom app. There was +/- 190MB left. I tried NUMEROUS times to purchase an extra GIG to last me till the end of the month, but every time the message was ‘can’t process your order due to a system error’. I had to attend to some appointments and left the house. I got a sms later in the day stating that ‘You have exceeded your voluntary call limit on ***’. I phoned my mom at the house and instructed her to switch of the modem, by the way she doesn’t use the internet. Tonight I wanted to purchase extra data just to discover that my account is R2052.12!? What the hell? Where did all the data go to if nobody used the internet and now I have to fork out R1500 extra even though I TRIED TO PURCHASE DATA THAT MORNING! Please advise!</p>