Telkom is giving me a run around

I have fallen behind with my landline rentals and have on numerous occasions try and make payment arrangements I was told because my line is suspended I cannot make such arrangements and should wait for the account to be handed over to lawyers to make arrangements as they cannot make arrangements after the account have been suspended, I have than requested that the line be cancelled and I get send the settlement amount in order to not be handed over, I was told that the line cannot be cancelled unless the arrears are paid in full. Which is rediculous as I cannot use the line, yet I get freshly billed for it each month adding to the arrears. I do not understand why I cannot cancel my line and pay the arrears off, or in full. I cannot pay for a service I'm unable to use, it doesn't make sence, please help as I have been battling with telkom for weeks.