Holden Cruze 2014:

I own a 2014 Holden Cruze Equipe. I bought it brand new, always serviced from local dealer, and never had any issues with it until I had a crash. Rear left panel is badly damaged in crash and this damage to rear panel has not only caused reversing sensors but it also affected all electronics linked to reversing module which is located under the trim behind damaged panel. This includes the main control panel with radio and CD player, there is no sounds, not even indication sound when indicator is on, no light on screen, no Holden logo, no my link, nothing completely dead. What may have happened?