Does it appear that they are claiming ownership of your article? If so, there are things you can do starting with writing to the owner of the site. Although you may be feeling angry at finding your work out there, try and make the email nice. They may be unaware that it's wrong and if so, will take it down or credit properly right away. If they are linking to your original article, then it's a good thing. The share buttons below our articles here are so people can share them and bring more traffic to your hub or website. If it was an Ezine article and your name is included with a link, they are not necessarily doing anything wrong. Ezine was built to allow people access to articles for their sites with attribution of course. The site where you found your article may have published it before you removed them from Ezine and were unaware of the change.