What if he did the following: (Score 1)

I suggest he goes out and finds a second hand version of the game (irony dictates it should cost less than £1.30). Then he should write them a letter claiming he does own the game but since the gamedisc was scratched he downloaded it so he could play the game which he legally bought (Do not forget to scratch the disc badly, also throw away the ticket!). Doesn't this clear him? If only it were possible to forget sticking a £600 poststamp on the reply letter.