Hatch back lock is stuck in closed position

Sounds like the lock cylinder is jammed. You may need to find a VW specialist or a locksmith. I'd try the VW guy first, myself. Have you tried to remove the interior trim on the hatch from the inside of the car? That's probably the way to get to the lock mechanism. Here's a directory link for you: http://repairpal.com/volkswagen-repair-in-rollinsville-colorado