I'm really sorry to hear that you've had some trouble with your phone line, and I'd really like to help you further with this.
I've run some testing my end and I'm unable to see any reason for this downtime. I'd 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 trying your phone on a known working line. I ask this as the next step would be to book a technician to call out and take a look at things.
I'll send you a private message in order to ask some further questions. Please look to the top right of this page where you'll see a purple envelope icon, click on this and you'll see my message.
Many thanks and apologies once more.