Okay this has been resolved.
Got a message from FJ :
Dear User,
Thank you for contacting FortuneJack support team!
We have reviewed your report and checked it with technical group as well as our administration.
We appreciate giving our casino your time and thoughts and reporting the issue at question.
FortuneJack is crediting you with 0.3 BTC including Bug Bounty for your troubles.
Thank you for playing with FortuneJack! Feel free to contact us 24/7 if you have any additional questions. Good Luck and have a great day!
I confirm that my FJ account has been credited with 0.3 BTC
Better late than never!
Thanks everyone for the support.