Telkom changed my contract without my permission

<p>How can my data contract for R199 a month suddenly become R352 this month without me signing anything new ... I want the managing director of telkoms accounts dept to please call me on 0 8 3 5 5 6 1 5 9 4 or at work on ***</p> <p> </p> <p>I suspect this is a ***** case and as such if no one calls me from telkom accounts dept tomorrow I will be going to the SAPS to press charges ... </p> <p>No one seems to call me back from telkom </p>