Disclosure: I'm founder and CEO of Oshi | It feels like I'm constantly bumping into this guy... He is also going around under the pseudonym 'V Wong'.
If you want a detailed explanation of what actually happened, it's worth reading this thread on AskGamblers:
http://www.askgamblers.com/casino-complaints/account-possibly-closed-unknown-reason-still-missing-fundsEssentially it's a double spend attack that has subsequently been corroborated by Cubits, the payment processor dealing with this particular transaction. He took us for over to Bitcoins and now he's just spreading hate around the Internet. I'm just sorry this guy is just so toxic.
Do not play at this casino. Seems they only allow people to come and lose. I won up to 6.6 BTC and tried to withdraw it. It seems they closed my account off. When I chatted to live chat, as soon as I told them my account they ignored me and closed off any communication with me. They wont respond to me at all. I was playing on the live blackjack table so its not like i hacked into the game to win or something. These are live dealers. I cannot get in contact with any support at all, i cannot get back into my account. They robbed me off my winnings and my deposit!