Hi There,

I had busted plastic worm inside the lock mechanism in my 2011 Wagon boot door,
Since I have opened the lock carefully without breaking the unit to confirm if its fixable, as I was under warranty at that time so it was fixed by the dealer at no cost to me.

If you got nothing to lose, check if there is an actuator OPEN/CLOSE switch inside will signal the controller if is moved to its position and safely locked the boot, its bit of hassle to pull the trims of the boot though.

I had my boot lid tied with a rope till get all fixed.
Good luck