Welcome to the Community, I'm very sorry for the problems you're experiencing with your telephone service at the moment.
I've located your account to take a closer look and run some tests on the line from our end for you, we're not detecting any errors from our end at the moment. Is your phone plugged into the master telephone socket or an alternate socket? Also, have you tested your handset? By trying more than one handset or your handset on an alternate line?