I'm really sorry to learn of the issues that you're currently having with your phone line, and I'd love to help you out.
By the way, welcome to our community.
I've done some checks on your phone line, and can see no reason why you should be experiencing this fault at the moment, so I'd now have to ask if you've been able to eliminate the phone from being at fault, either by trying another phone on the line, or by trying your phone in a known working line.
I ask this as the next step would be to get someone to call out and investigate the issue further. I've sent you a private message in order to discuss this further.
Please take a look at the top right of this page where you'll see a purple envelope icon, click on this and you'll see my message.