A website I run has been copied almost entirely by a medium sized US company. My website provides information and most info on each page of my site is now included as part of their pages. I sent them a C&D letter with no reply, although they replaced my graphics with theirs as a result of the message. I also wrote to the registrar who said the host is solely responsible for publishing the plagiarized content. I wrote to the host which is a big US ISP also providing hosting solutions for businesses. They have a dedicated email address for Copyright infringement cases, but never replied to the two messages I sent them. I don't live in the US so this could be the reason why my C&D letters are being ignored. In the past I was able to take a website down in a matter of hours by writing to their host.
What should I do? This is very frustrating. Would filing a DMCA with Google help?