I stumbled across a website that has copied the data from my website and then found it has also set up numerous subdomains and doing similar to thousands of others. 25,000 results come up when I searched for the domain. When I try to click on any of the links including the main domain it only brings up Forbidden. Even the cached pages bring up Forbidden even though they appear in the searches when I search for a certain phrase from my site.
There are four main options for communicating with Google, and the details are listed in the Google Forum Charter [webmasterworld.com].
However, don't expect immediate action. In most cases, Google prefers to study the situation and understand how to improve the algo so it doesn't miss whatever the spammer did to get past it. Quick, manual adjustments are rare these days.