adder - 6:02 pm on Jul 24, 2013 (gmt 0)
Rewrite the article.
Good idea. Add more content and multimedia and make your version better than the stolen version.
The OP sold his article to the thief
@martinibuster is right. I think you might struggle with DMCA now that you've "entered into an agreement" with a scraper site.
What you can do is try to identify a dozen other sources the scraper steals content from and get in touch with the webmasters of those sites.
If they all submit DMCAs, there's always a chance the site is pulled down altogether.