Intermittent service AGAIN

Once again my telephone line and ADSL line are erratic. I contacted my service provider who advised that my faulty telephone line is affecting my ADSL. The last time ( a couple of months ago) this happened I had numerous technicians try and fix the problem but none of them had a clue. The one even tried to blame my modem. IT IS A LINE ISSUE IN OUR AREA, A SPECIALIST TECHNICIAN NEEDS TO CHECK ALL THE CABLING IN THE AREA. Do not waste my time by sending another useless technician to waste my time, this issue keeps happening it must be escalated!!