mtnedi:
Be very, very careful. They want you to come back and lose this money (and more). It has happened to many players. They get on a winning streak and think it will last and then . . . it goes bad. Gambler starts to chase his losses and next thing he knows he's lost the big win and starts to chase it with his own money.
Do not fall into this trap. Cashout, don't play, email them, call them, email them again, call them again. But do not play. Giving back 30K was not wise, I know you are still ahead, but you have all the symptoms of the person I've described above. Stop now, I'd hate to see you lose this money back.