Can not fold seat because A. release lever immobile. B. release lever no longer connected to cable? C. something else.
If its jammed due to twisting, try putting a lot of downward force on the rear driver latch. If the cable is broke or disconnected, it will have to wait till daylight for me to go investigate on my 3rd row seat. Most likely the torque of one latch out of place is putting a lot of pressure on a mechanism not designed to release under that much pressure.