A well built aircraft can withstand a rupture in the hull, even with explosive decompression. But the elevator and the rudder if damaged could lead to unusual attitudes. The flight path described certainly looks like a spin, the turn one way, then the very rapid spiral descent. As for no communication, we all know the rules. Com comes last on that list.
What Mary Meagre says makes most sense to me i would just add that the A320 is fly by wire so we don't know what was damaged in the explosion which gave the crew little or no control