Your best chance is to get the attention of Duelbits representative so that he will find a way to personally follow your case until it's finish. Your case is a bit not top priority since the mistake is from your side and it can be considered as loss already due to the warning message as reminder before you deposit.
So just keep reminding them and be patient, the issue is something they will help you solve at their own convenient time, I will only advise that you take the advise of AbuBhakar and put into consideration., find a duelbits representative who can help you be in charge of the case until it's resolved.
Do you know how to contact a duelbits representative ? I tried to contact with @duelbits in this topic but he was inactive for a long time.
I'm not sure why my case can't be in a priority. duelbits is a business company and a business company deals with money. They don't need to resolve my case for free, they can charge me a fee, this can be a win-win situation. If they don't help me, no one win, the fund will be frozen forever. And just in case they decide not to help me and it's in their ToS, why don't they reply me soon ?