Face to face, even better. I still think a few hundred (maybe more) emails can not be ignored, especially when you C.C the other parties in on it. The pressure of knowing you may be the only one not taking this seriously usually forces one to do something.
If you do email these parties, post your email here, knowing you are not alone makes you braver. And invite a friend to do the same, if 6000 jobs do go and they get even half that many emails, it will force a response and expose these fools.