5 months and problem still not solved

5 months ago I requested that telkom move my line. (They had a deal to move the line for free). Then telkom advised that it would be better to take over the line at the new house. We agreed and proceeded. We then got a bill for transferring the line, which we paid. Then we got a bill for extentions and we don't even have a telephone. 5 months down the line, I have 2 lines on my name as telkom never cancelled the line at our old house and all the payments we have been making for the new house has been going to the old account. We have phoned numerous times and every agent say oh we fixed it but it's still not fixed. Can anyone please tell me how to solve this problem