Welcome to the Community!
Sorry to hear you're having trouble with your landline.
I'd like to send a technician to take a look at this for you. You've already tested your handset so we can safely assume there's an issue with the line.
I've sent you a private message (purple envelope at the top right of your screen) so I can arrange for a technician to take a look.
Tech fan? Have you read our Digital life blog yet? Check it out