I have submitted my game for review at couple of game publishers with zero response.

My game is very specific and unusual, so maybe I need to find very specific publisher, or maybe it hasn't been noticed in the sea of submissions, maybe the game is not worth publishing. In any case, I need to know for sure which reasons it is and I need to try all the options available before giving up.

Therefore I've been looking for a professional who knows how and where to try these options, but I'm at a loss on what would be the process to find such a person.

What would be the process to find such an agent?