Basically no service

I have reported my faulty adsl line to telkom for months but they never seem to fix they say they will escalate the issue to a specific department then just close the job card. Every few days i report the issue and telkom does nothing about it. Im paying for my service why am i not been helped this is frustrating i can never get a steady Internet connection you send technicians who do nothing and close the job card. Do you not have capable staff?