Service not working since installation

an ADSL line was installed more that a month ago and is still not working. Have had 5 technicians at the house looking at the problem each time leaving saying that they need to speak to their supervisor. Each technician did not know what the last one was doing their. <br> Last technician was at the house on Sunday ... 5 days later and still no feedback <br> <br> how does one get service out of the company when the hold time and the call centre is in excess of 45 min ?