You should not have responded or given them any information.  This is a old scam that seems to making the rounds with a new company name.  There are many more threads here with that same e mail.  You cannot be served by email, fax, phone, or even smoke signals.  It is only done by court authorized servers or restricted, certified, return receipt US mail.  If you have been to the CFPB site, then you should have read up on your rights, and what the law requires them to do.  If you didnb't, then go back and do so.