Over Charging and poor feedback

I am currently being overcharged by Telkom for an ADSL contract which I entered into at the start of the year.<br> <br> I am supposed to be paying R499pm for a 4mb line with a 20gb softcap, however Telkom is charging me R601pm for the exact same package.<br> <br> Trying to resolve the issue with the call centre is useless. They promise to phone back within 5 to 8 working days but never do. I have called the centre to resolve the issue a number of time (approximately 6 or 7) but no one is willing to help.<br> <br> Im tired of these large companies billing as they please.<br> <br> Will someone from telkom finally contact me please, or should I take this matter as far as possible?<br> <br>