Sure, if I manage to open the door, I'll order a brand new lock mechanism from RimmerBros. But for the time being, I'm stuck...
And actually, when I lock and unlock the car with the key fob whith my hand on the mechanism inside the door, I feel it's moving inside. So at least one of the motors is working.
I guess some spring or another part has moved inside the locking mechanism which prevents it to stay in the unlock state.
Will I have to use a grinder on the door and go find a new door to replace this one?