Ford KA 2000 Doors don't open with key (revised)?

RE: the 2000 Ford KA German model car that has door problems, here is more info:NO REMOTE is used, only key
DRIVER Door does NOT open with key, passenger door opens with the key, and then you hear a loud grinding noise. No one can get to the door mechanism, it is blocked PLEASE help my neighbor She has to climb over the seat to drive