The site is legit as far as I know, but if you lose that kind of amount you must be seriously disappointed and what you have left is minimal compared, I'm sure they will sort it out. An advice for the future is to not bet that kind of money, just have fun and bet what you can afford to lose, like it's already gone. Threads like this appear everyday here sadly.
This exactly, this is why I'm always holding off on how much I'm gambling with.
It's just not worth going through all this hassle of sorting stuff out.