2006 Pontiac G6 Manual wont start
 

My son borrowed my car and I need help fast. I have to catch a plane home in 2 hrs and my son is 1 hr away with my car. He turned it off, got out and didn't lock it. When he got back in to start it, it wouldn't do anything. It has a light with a car and lock lit on the instrument panel. He's disconnected and reconnected the terminal to the battery, followed the sequence given in the handbook. Tried locking & unlocking the car both with the keyfob and manually but nothing has worked. Nothing's open to help since it's sunday.