6 weeks, no service

It has now been six weeks that I haven't been able to make or receive calls on my landline. ADSL works fine but I get no dial tone and anyone who calls in just hears ringing with nothing coming through on my side. Attempting to call in also knocks out my ADSL for the duration of the call. I've reported the fault twice, escalated twice when the fault was erroneously marked closed, reported on this site and given feedback as well as spoken to a fairly rude representative on the phone. Yet I receive a full bill charging me for a service that has not been provided for over a month and a half. This is pathetic.