Educated men can spell "their".
Two possibilities with the door. One, it's locked. Try both knob and key to unlock it in case a link has come loose to one of them. Two, the latch mechanism is broken or both unlock links have come loose. There's a plastic vent on the rear of the door which gives you access to the latch - but you have to have the door open to reach it. You're probably going to have to remove the interior door panel with the door closed and reach the latch from inside. This will be a PITA.