Hi @iwakefield, thanks for posting and welcome to our community.
Sorry to hear that your landline is not working and for any inconvenience this may be causing you and your household, friends and family. Can you please advise, if you've tried using an alternative handset? Also, is your phone plugged into your hub, or a traditional phone socket? Did you receive any notification of a migration of your landline to 21CV? This is landline via your hub and is explained here. Also, if your landline is still via the traditional method, you may find here and here, useful. However, as you've reached out to us, I would love to have a look on your behalf. I am going to send you a private message. Please look out for the purple envelope in the top right of your screen.