I'm very sorry for the continued problems you're experiencing with your phone line.
I've been able to locate your account to take a look at this and run some tests on the line from our end for you. We're not detecting any errors from our end at the moment, I hope that means that things are working at they should?
If not, have you been able to test your handset at all? By trying an alternate handset or your handset on an alternate line?
Craig_D is away at the moment so I hope you don't mind me stepping in.
I would like to arrange for a technician to visit your property so if you click on the purple envelope at the top right of the screen you will see another message waiting for you with further information.