Telkom makes you pay for a suspended line. Pay for a service you don't receive.

My account was suspended because I did not pay the required amount, I cannot understand how my fixed line phone bill became so expensive, anyway I phoned Telkom and informed that I would pay over 2 months. When I received my bill this month I expected my amount owing to be halved, but this was not the case as Telkom charged me rent , even though my line was suspended.

I called and queried, but was told that I had to pay the line rent money. THIS IS NOT FAIR, HOW CAN I PAY FOR A SUSPENDED LINE, FOR A SERVICE WHICH I AM NOT RECEIVING. Should I contact the consumer commission or what shall i do??