Welcome to the forums and many thanks for your post. I'm so sorry to hear of the issues you're having with your landline currently.
I have been able to locate your account using your forums details, but have been unable to run further checks on your landline. I would like to get a tech visit booked in for you so we can resolve this. I'll just send you a private message so we can get this sorted - please look out for the purple envelope at the top of the page.