Faulty ADSL

I posted a complaint a couple months ago about faulty ADSL line, and it has still not been resolved.<br> <br> I have however been billed correctly for these months even though my internet is not working.<br> <br> Every time i call the call centre and give them my fault reference number they keep telling me the fault is with the technicians and they can't do anything about it. When i ask for someone to personally handle my matter as its been a few months that the line has been faulty they tell me that they cant give out any numbers or the supervisor is \not in today"<br> <br> I don't know what else to do."""