[Punker]

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I understand that this is most likely just some investigation that is taking longer then it should. However the most annoying part is that, they dont tell me anything.

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If you won $14,000+ in 24 hours, they are likely concerned that someone has fraudulently deposited and has dumped the money to you. They may now be waiting to ensure that that person's deposit clears (through Visa, or FirePay, or whatever) before they allow you to cash out.

They are unlikely to tell you anything before they are finished their investigation as it serves no purpose; they've told you it's under investigation for fraud (and I'd put it at 99% it's about the issues I describe above), what more should they tell you?

Just be patient and let them finish the investigation. If you've done nothing wrong, you shouldn't have a problem.