Hi
well done on the Big win
i think you will get your winnings as they have plenty of BTC in there wallets
see this
https://www.walletexplorer.com/wallet/FortuneJack.comSites like this can not afford and issues with wins like this
so they will take there time and check things are 100 % before any payout is made.
Yeahhh , fortunejack already paid kweniboo worth 160+ btc for win in their slot previously. And their hot wallet as you said above contains over 100 btc it means they are ready to pay off just the matter of time.
Just be patient and don't worry, fortunejack are one of trusted bitcoin gambling site and they Wouldn't ruin their reputation for case like this.