Firstly I'd like to welcome you to our forums and say that I'm really sorry to hear that you've been experiencing an issue with your phone line. Thank you for letting me know that you've already eliminated the phone from being at fault, as this really does help.
I've run some testing on your line, and can see no reason why your line shouldn't be working at the moment, I see no evidence of any local issues, and the line is not returning any errors. This does not mean that there is no fault, it just means that the next step now would be to book a technician to call out and investigate further for you.
I've sent you a private message in order to set the wheels in motion, please look to the top right of this page where you'll see a blue envelope icon, click on that and you'll see my message.