Did you check your email id associated to that site , as they send the withdrawal email to confirm it, so that if anyone has hacked your account they cannot withdraw it without your consent, If that is not the problem , then i think you have to wait here for the admin to reply or just go to live support , they may be helpfull but i am in doubt as i have seen most of them are just a dump chatters who dont know much about the site details.
I didn't receive any email, nor was I asked to wait for one. I got an instant on-screen message that my withdrawal has been approved and my balance was reduced accordingly. I did reset my password shortly before that, but don't think that could cause any issues.
I'll check my FJ account when I'm back home to see if there's any message and will contact support if no luck.