My friend, do you have any evidence, maybe adding screenshots is a good option to verify your case, as proof that you have that amount, and some screenshots of your message replies from their services that will strengthen your complaint to them on the forum, especially to us forum members about your case, thus there will be many people who will help you to make representatives from Seabet respond to your problem.
Although he did not provide evidence but I tend to believe that what he says is real because he is not the only one with such complaint.
There are at least 2 users who are complaining about their withdrawal here and both accounts are under review, it seems that it is standard procedure from this casino to review all withdrawal request.
Bad news is that seabet representative is not really providing enough clarification or information about what they are doing to those 2 accounts.
OP is too busy in bumping this thread but forget to prioritize important thing about their own services.