LINE NOT WORKING FOR THREE MONTHS!

We moved a perfectly functional data and voice line from our Linden property to our Bryanston property three months ago. The line was installed, however it has not worked since installation. Telkom very merrily bill us for line rental and other charges even though we have not had the pleasure of using the line once. No matter how many times you report it as faulty, no-one can give a solution, or get it fixed. Escalated the issue three times, no response. Why should I have to pay for something that doesn't work? Is there no-one at Telkom who can resolve this problem? If Telkom didn't have the monopoly, I would definitely go somewhere else. Really shoddy service.