+1 I don't think DL does straight status matches, they do challenges. Unless you got it though some back channel it's almost certain you were on a challenge.

Here is their standing program: http://www.delta.com/content/www/en_...challenge.html

I believe they send you an email when they do the initial match spelling out the terms of the challenge.

It might be helpful if you can provide more details (i.e. what did you match from, have you ever matched before on DL, what has DL's response been when you called).