Quite common on these I'm afraid. There are a couple of BCM's, one in each door and a central one also. Only way to find out which one or all of them is to Tech2 (diagnostic) the vehicle.
Its unusual for all of them to go though to be honest, its usually one of the door ones. If the fuses are 100% ok (cant remember if there are multiple fuse boxes in this model) then its off to vauxhall or an independant I'm afraid.
You could try disconnecting the battery for 30 mins of so, then seeing if it resets them ..... you will need your radio code if you do this though