OVER BILLING CONTRACT

<p>I've had my MTN contract for over 3 years now. I made my upgrade last year April with no problems until last month.</p> <p> </p> <p>My contract is a top up with a monthly payment of R690. Last month I was billed R900 and when I called customer care I was told it was because I bought data on credit? I don't even know how to use this credit facility as I always buy airtime which I convert to data bundles. I was told my query would be sent to the billing department for investigation. Nobody has contacted me since. This month I was billed R892? This is ridiculous! Is Mtn trying to recoup the billion dollars fine by committing blatant **************** against its customers?</p> <p> </p> <p>I need answers as to why I'm being billed for facilities I am not using and how things can just change mid contract without informing me. </p>