Charged for usage I did not use

<p>i signed up for the 10gig special at R199 at the start of the year. Each month I added additional data when my usage was up. During the month of April I did not add any additional data but had such a fright when I saw my bill was R699. How is that possible? When I got the message on my screen to say I have run out of data I immediately unplugged my router and did not add any additional data. I then logged a call to find out why and I was told I have a default credit if r500 on my account. I did not agree to this nor was I informed about the r500 credit. I have had to log three calls with three different case numbers and still nothing has been resolved. I WANT THE VOICE RECORDING WHERE THE SALES CONSULTANT TELL ME ABOUT THE DEFAULT OF R500 CREDIT WHICH COMES STANDARD AND WHERE I AGREE. If I agreed to it and if I was informed then I will gladly pay the R699. But if not, then I will not pay the additional r500. Please treat this as a matter of urgency. Also, when I logged a second case, I was told that someone will contact me in 72 working hours. NO ONE CALLED ME!! I just received a SMS stating the query was resolved. How can it be resolved when no one bothered to phone me to discuss this. </p>