A website is republishing my posts without asking for my permission. It is not using autoblogging, it simply copies posts (not regularly) from my blog and paste them on its blog, without changing anything, even crediting me with a linkback to my original post placed at the bottom of its post. This link text reads: "this article is from my blog".
The problem is that Google is deindexing my post-pages and replacing them with its post-pages republishing my post (my posts were on the first page serps and now that blog is there with my work, with my posts disappeared from search results). That even if it gives me credit for republishing my posts.
What do you advise me to do? I tried to contact this website but not getting reply. Is there a way to report it to Google with any hopes to have it fixed?