In fairness to Duelbits or any other casino/gaming website in this sort of situation, as far as I am concerned they are not under any obligation to make any comment regarding an alleged scam accusation (or any other allegation) if the one raising the complaint is not even the alleged victim.
In my opinion, if any casino or gaming website make comments about a matter without ascertaining the alleged victim gave permission to a third party to discuss it on their behalf, they could be breaching various privacy rules and laws.
For those reasons, I do not expect Duelbits to post a reply here and as the alleged victim will not come to the forum to raise a scam accusation, there is little point in continuing to post here.
I've sent them a PM with the details you provided here and through PM to me. I can't promise you ASAP, because, as I said, I am rarely in touch with them, so I am rather unfamiliar with their response time and I don't have a contact of their staff. So, instead, let's wait a few days to see if the PM reach them and they'll pop in here.
If by the end of week [that's Sunday, just to be clear] they're yet to be online and respond here, I'll try to find and exhaust other means of contact to reach them.