Sounds like an intern to me, or a jerk. I know a lot of editors use interns when they think they are too high and mighty to respond.
I personally do not deal with people like that. I only like to work with editors who personally respond to emails, even if it is a rejection. To me, if I get that personal response, it is building a relationship and they will remember me next time.
There are some large magazines and newspapers who do practice this. Actually, you can bet that those who don't even publish their phone number anywhere (I can think of several like this) are not worth my time even. You can get just as much pay from those who are nice!
By the way, I'm new to this. I guess I'll post an introduction whenever I get around to it! Nice to be included!