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