I'm so sorry to hear that you're experiencing a loss of your telephone service, and I'd really like to help you out.
I was able to locate your account using your forum credentials, and I've run some testing which has not given any reason for your loss of service, so now I'd have to ask if you've been able to try another phone on the line, or try your phone on a known working line? This would be a final check to eliminate the phone prior to booking a technician to call out and investigate further.
I've sent you a private message in order to get things moving once you're able to confirm that the handset has been checked. Please look to the top right of this page where you'll find a purple envelope icon, click on that and you'll find my message.