Actually, if the hub is flagged as duplicate, try find the source. Did you post it at another place or any1 stole your article?
If stolen, (and the date of your publish article is earlier than the stolen on), email the hubpages team and they can assist you.
If you had copy or used about the same article from others, the best is redo it again. I think the flagg system is about 20%.
Even if you resummit it, it might take months for the flagged to get off.