You should try asking about you case in their official thread ( Duelbits.com | Casino & Sportsbook | Earn up to 50% rakeback | VIP |)as it might bring some extra attention to your case. Their account hasn't been online for 2 weeks now so it might take some time to get any reaction from them.

By the way, there is another relatively similar case going on at the moment and it seems like their verification can last for quite some time https://bitcointalk.org/index.php?topic=5405780.0