I can't tell from your post what you wrote -- and if the reply addressed the email you sent. [Don't post it here ;-) ]
1. Did you submit your Response to the NAF?
Or was your email to the NAF "just a question" about something, and not the official submission of your Response?
2. If so, did you submit your Response to the NAF by BOTH email and did you also submit three copies to the NAF by fax or postal mail?
You must submit your Response such that it is received within twenty (20) days after the commencement of the administrative proceeding. This date is shown on the Complaint you received.
You don't want to wait ...