obviously a scam if they only cancel winning bets man.

Lets not jump to conclusions before we hear more information from OP and FJ.

From what I read in screenshot is that game provider canceled bets so it has nothing to do with FortuneJack.

Who is provider of lighting roulette? I can only think of evolution gaming https://www.evolutiongaming.com/our-games/live-lightning-roulette but we all know how they deal with their customers https://bitcointalk.org/index.php?topic=5105084.0.