If they dont want to listen, approach the host, they should pull it down.
This is by far the most effective method, especially if the site is on a shared hosting plan. You might meet a little resistance at first, but a hosting company will cave in and pull the hosting for the site with a little pressure.
This method works 95% of the time and I have got many a site brought down using this method when my content has been ripped off.
Just be sure to reference your content and if possible link to your pages which have already been crawled by the Wayback Machine.
A DMCA to google is slower and also if the webmaster disputes the DMCA you will have to follow through as google will then want proof that you are carrying the DMCA out to the end. When I just started my football site an adsense super affiliate decided to scrape the content of all my articles.
A DMCA to google got his adsense account suspended. He apologised but disputed it none the same. But, he didn’t scrape any of my content moving forward. However, google informed me, his adsense account would be reactivated after a week if I did not follow up on the DMCA.
I therefore decided quite rightly to not pursue it as it would have cost money to complete the DMCA to the end.
However, it was natural justice to see this big adsense affiliate sweat for a while, whilst his money stream had been cut off by Google, even if was temporary. 