Not good news. My car was like that when I went to buy it (Left Rear Door wouldn't open). The latch was disconnected from the operating rod. The dealer had to break the door panel to get into the door. Took 4 weeks to get the panel. I hadn't purchased the car yet, so I lucked out that way.
The screws to get the panel off are covered by the door jamb. Unless someone else has removed the panels without breaking the door panel and can tell you how, you will have to do some surgery.
Is the car under Warranty?
