NO ADSL

I have been trying since November to have my ADSL line to work, have had a few visits from Telkom technicians who have informed me they cannot find any problems, it is intermittent therefore difficult to trace. The last Technician, could not get anything right, said it must be my router, gave him another router which is still brand new, this one did not work either.I was then instructed to take it into one of FEW service centres. I have sent numerous e-mails to the Escalation Centre, called 10210. The one technician could see that there is a problem on my line. I have had NO response to my last few e-mails (other than the automated one), nor telephone calls. I even tried to find out about the new broadband they are selling, but was informed that there is no coverage in my area