Hi there Adam1234567893,
Unfortunately, this game does not have a feature to change your match making search options. Blacks Ops 2 did, and the previous support personnel you spoke with may have been referring to that game. I apologize for the confusion.
Oh okay when will the listen/dedicated servers be up? Or is there a problem with region lock? I live in Florida and it keeps putting me in lobbies thousands of miles away at all hours. I know it's not my internet I have the 150mbps download 50mbps upload package from Verizon and I have all the ports needed port forwarded and my Xbox 360 is in the DMZ zone and I have the closest DNS Servers selected for my Xbox 360 so I have no clue what is going on cause it seems like I am seconds behind everyone no matter what I do I have no clue if it's a server or matchmaking or region issue. Please let me know what's going on if you find out.