Thank you for your post and welcome to our community forums. We're here to help.
I am really sorry to hear you've been facing some ongoing issues with your landline services. Would you mind expanding on the issue, what diagnostics and troubleshooting you've done thus far, and what the team have advised on the matter when you've spoke with them?
Thank you for the prompt response, and for clarifying the situation a little further for us here.
I'm going to send you a private message in a few moments so that we can acquire some additional details from you. Please respond to this at your convenience and we can go from there.