Does this mean you're have successfully withdraw multiple times, but your $2,740 withdrawals since June 27 are still processing until now? the rest $13K which on your account has been wiped by them? they must be have explanation behind that.

Well, no doubt Duelbits flagged your accounts since you're won big money and exceed your deposit amount, I think they're currently do a whole investigation to see if your account have did suspicious or breaking their TOS.

AFAICS the accusation is legit and we're need to wait Duelbits's response this accusation.