To turn the sabbath mode off you need to press and hold the opition button and the + button for several seconds.
If you look at the screen either side you will see 3 buttons. Its the center button on the left side and the top button on the right.
Press and hold both of them for several seconds and that will turn the sabbath mode off and should get it working again from there.
Try that and let me know how it goes.
Nice one glad to hear its sorted and thanks for letting me know how it went.