Thanks all mate. I updated the conversation with Duelbits support so far in #1. They don't give me the time frame so I just wait. I will post a message in their official topic so they can get notice.

Honestly, this is my own mistake. So I must take whatever result, I don't blame them.

Technically, I think that they have private key and can retrieve the fund. But it can take a long time so they don't give me the time frame.