First step is to go your mortgage company and take their advice. You cannot take your name off the deeds if there is a mortgage in your name - the mortgage company won't allow it.
If push comes to shove you will have to take court action to force a sale - which you are entitled to do.
So, immediate plan of action for you - gather all relevant paperwork. Phone mortgage company for appointment.
Then go to Citizens Advice Bureau.
Then think about the best way forward.
Good luck.