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Try to be patient. They are telling you to wait, with that large amount they need to verify if there's nothing suspicious on the account's activity, their system and everything. 2 days is still too early to accused them despite of answering them responsively answering your questions.
Edited your image since imgur cannot be embedded here for now.
I agree with you, however not only Duelbits but several other casinos will definitely do the same if their customers hit a big win and want to withdraw it.
This is a natural thing because casinos cannot just accept large withdrawal requests, they must first verify it to avoid unwanted or suspicious things.
I don't think the OP needs to state that the team has tricked him because it is listed for him to wait for the verification to complete first.
Saying this is a scam is too quick an assumption in my opinion.