Even although it is Openreach that maintain the phone lines it is up to your phone supplier, BT to have it repaired if there is a fault.
The moderators of the forum have been informed of your problem. Once they have read this they may be able to help. They are a BT UK based team and if they can help they will reply via this thread asking you to contact them via a link. Once you have replied to them by the link, it can at present take up to five working days for them to re-contact you.
That's not good. Send me in your mothers details using the "Contact The Mods" link found in my profile and I will chase this for you.