Did you read their policy?
I hate to tell you but Google still has the same legal requirements as anyone else and they need the legal documentation to back up their decision to yank off a web site. If they just yanked any web site offline based on every email they got without a signed affadavit attached they'd be bankrupt defending themselves in legal fees alone so they do it by the book.
They WILL help you, but you have to send the DMCA and if you don't it's your fault.
You can fax it today.