Welcome to the Community, I'm very sorry to learn about the problems you're experiencing with your phone line at the moment.
I've been able to locate your account to run some tests on the line from our end for you. We're seeing some issues with the line from our end and I'd like to arrange for an engineer to come and take a closer look as a result.
I've sent you information regarding an appointment in a private message, which you can view by clicking the purple envelope on the top right of this page.
Apologies again for the inconvenience caused, we're looking forward to putting this right.