Hi Teresawinfield1, thanks for getting in touch.
I'm really sorry to hear you've had this issue with your landline for so long. What happens when you try to test-call it - do you hear any ringing or something else?
It's good you have already tested another handset so we can rule out any issues there, I'm unsure why you were asked to do that twice though.
I'd like to take a look and see what we can do to help, please get back to me via PM and we'll take it from there.
Tom