Dealing with a fact that you have been scammed is not so simple. People
invest time and effort and when they don't get the prize they fall in depression,
some are furious. I believe the best thing someone can do is to listen both of
you, no worries, no despairing, putting that behind and moving on is the best
solution.
   I recommend one more thing. Publicly speak about that ICO, make scam
accusation against their team. Share as much info about them as you can,
maybe they can be useful in tracking scammers and their future projects.