Yet another one. Just replied to another guy. The lock catch is faulty, there a known
problem. If your stuck there's a slot in the centre of the boot liner, there is a manual release just use a thin stick(ruler) to open. If you've got the liner off. The lock catch at the bottom of the door is held on with two m8 spline bolts. Just replace it you can't fix it. Same lock catch on golf, some Passat, and polo 6r. Don't worry it's a real easy fix.