So when I send a PM, it appears in my Outbox, but not in my Sent folder. The information underneath the title of the PM says "Sent: [Date]" so it looks like it's been sent, but it's still in the Outbox. So was it sent or not?
Sadly, the nature of the Call of Duty community means that communications to the studio or publisher are very unlikely to be returned unless they are official business inquiries. Its not exactly like writing a letter to your local congress/parliament representative where you at least get an automated reply.
Basically, you will not be replied to, for any reason. (This is occasionally untrue if you contact @fourzerotwo on Twitter.)