Credit Protection Depot Email

Does anyone know the email address for Credit Protection Depot? I have defaulted on my loan with "www.paydaymax.com" (on purpose). I have a letter I would like to send by email letting them know that I will only pay for the principle of the loan... I have already posted in the forum regarding my pdl troubles and am taking the next steps. An email was sent from "CPDCustomerService@CreditProtectionDepot.com" -- I tried this address and it was returned. I then tried "CustomerService@CreditProtectionDepot.com" but it was returned again. I would prefer to email them. Anyone have any advice or info on these guys? :)