As you have hopefully discovered, the official Emule site is
www.emule-project.net www.emule.com is in no way related to scam sites, e-mule, or anything else related! unless you are actually referring to
www.emule.org which is a scam site.
This last site is listed as a scam site, and if you have paid them money the following link may help.
get your $$$ BACK!!!(music members)
As for actually reporting scam sites, I'm not absolutely sure if there is a body you can usefully report them to.
This thread will also be of interest if you have not seen it.
Membership? - **WARNING ** BEWARE** - Download p2p Clients ONLY Thru Official Sites
Does this help?