Cannot cancel telephone line

Due to a bad line which the Telkom technicians promptly and repeatedly fixed each time, I decided to cancel my Telkom line. I went to a Telkom Store at the Glen shopping center where I was told they cannot cancel the line but I should rather call the call center. Problem is, I cannot call the call center since my Telkom line does not work. I do not have access to a Telkom line and now I continue to pay for a service I cannot use.<br> <br> I would really like some assistance in cancelling my telephone line as soon as possible.