vwgolf02

Hello everyone, I have a 07 400h and my problem is that I cant start this car. It was involved in an accident, everything was repaired. Now I cant start it. My 12v battery drains really fast. I read that it has an emergency shut off system once the sensors sense an accident or rollover. Also that you can reset the hybrid system.

I really dont know where to start. I hope I wont need to take it to the dealer and just fix this problem myself. Has anyone else had this?
Any help would help/