According to WhoIs, Blogmas appears to be a Danish blackhatter (according to the phone number). There appears to be no way to reach the sight owners, so most likely, you will have to deal with their hosting company, TURNKEYINTERNET.NET.
What do you do if you find your articles stolen? Check out a previous post here, Dealing with Plagiarism for details about how to handle the situation based on your content’s rights (exclusive v. non-exclusive). There is a link on the right side-bar to a very helpful site, Plagiarism Today if you need some DCMA templates.
Let’s hope they are shut down soon.