I wonder how these 1xbit signature participants will have to say now or one from then would even show up to defend their beloved casino. What a shame they are still promoting heavily and they are as well scam big time such as this one and the recent thread made linked above by @bitbollo. It never gets old and I doubt if it will be given back to you again OP.
From the last sentence you gave I guess you've made a good initiative to call a lawyer and hope it will be successful.
While I am obviously sorry for what happened to the OP at least it seems that legal measures are finally going to reach this casino, after all it is one thing if they were to have a dispute with one of their gamblers, they were on the right and decided to not honor the bets.
However the behavior that we see with them is systematic, as soon as there is a player that somehow is making money then they block their account or put it under review and then never pay, this has to stop, and using the law against them seems like the only option left.