No service

I have been having problems with my adsl line syncing at almost half the speed it was 3 months ago and has been unstable and disconnects every 5 min for the past month. The copper lines needs to be repaired and replace but they just let the technician come out and check out but they never find anything and if they do find something wrong they send it on and it never gets resolved. The lines to need be replaced and repaired since I have zero connection currently and still paying for my internet.