Need Advice About Hijacked Content

Hi guys, I just found out my content is being hijacked and used on an E-commerce site in India.

I was checking to see if my most recent post was indexed. When I didn't see it I checked the "images" section and saw one of my pics first. However, it is linking to some E-commerce site. After following the link I noticed each of my pics on this site, as well as my content taken word-for-word (except for certain words which were probably translated incorrectly).

I immediately sent an email using their "contact" form. It failed on the first attempt and apparently succeeded on the second.

I investigated further...

My website is still appearing in search results for my two previous articles, but not this most recent one which I posted a few days prior. The title and url have been taken word-for-word, but my domain has been replaced with this E-commerce site (for only the most recent post).

I went back to this E-commerce site and decided to try looking for more of my content. Upon entering one of my previous url's behind their domain, I was indeed taken to a page with more of my hijacked content there. Although it is very blotchy and not quite translated properly. None of it links back to my site, but there are pics of me (from my own author box).

Is there anything else I can do to resolve this situation? Is it safe to post new content? I was going to publish more content today, but now I am worried it might also get hijacked, and this other site will get credit, as they appear to have done with the previous post. It shows up as being indexed a couple of hours ago, although I posted it four days ago.

Is it possible that I have a security breach in a plugin, or is it more likely they happened to steal this content prior to it being indexed?

I appreciate any help and support!