Have you submitted your complaint to Casinoguru or AskGamblers ? there are others with your issue there, at least the third party mediators have been able to get BC.Game to respond. Wish you luck and hope your issue resolves.
Yes, a couple days ago I submitted it to Askgamblers. You can follow it here:
https://www.askgamblers.com/casino-complaints/bc-game-casino-they-confiscate-winnings-and-i-never-heard-anything-backUnlike the representative of BC.GAME on here, at least they are responding there. We will see if they are able to resolve the situation. If not then a flag will be created soon.