Over charged

<p>After several months using the same phone and the same methods my account is suddenly R5 000 plus. Discussing this problem with Vodacom they indicated that it is as a result of internet usage. How can this be true, so suddenly. I've asked them how they can allowed this, they told me it is an open account and I should know that. They also said we were told when signing this contract. I do not remember that and my daughter remembered telling the lady to put a block on the data usage. Is there a way they can proof this usage? How can they let an account go so far out of hand without informing us?????? Were in hell do we get that kind of money. I am a customer at Vodacom for many many years and this is a first for me. I don't trust them anymore after this experience. I've also noted that one of my 3G packages are suddenly 20G down and we are only in the beginning of the month. What is happening at Vodacom and their systems.</p>