From my understanding, you deposited money to test the bonus promotion. Then you proceeded to gamble it via the multiplier because you weren't expecting the way that the deposit was handled on the website. So let me ask you this; why didn't you just try to get a withdrawal at the time, before you lost it all gambling? I have seen wetsuit pay a user back 77BTC before because of a mistake (that the user made; not wetsuit). But that user never gambled the money away. You did.

Dude, just accept your loss and move on. No one's going to take your position on this one. If you wouldn't have gambled your deposit away, I could see getting behind you and getting your bitcoin back out. But simply put, you gambled it away. Nobody "made" you do that. You did it on your own.