Hi Sandra, and welcome!
It's too bad you got sucked into Atlantic International University, but at least you found out as quickly as you did and want to switch to something that will better meet your needs.
I agree that Norwich University is very good, their MA in Diplomacy is a great choice.
I also agree that American Public University is good. They're strangely named, as APU isn't actually a public university, but it's still legitimate. Their MA in International Relations and Conflict Resolution might meet your needs.
Another is Webster University, which has a MA in International Relations.
Another is Troy University, which has an MS in International Relations.
I also checked the University of London, thinking that they might offer something like this through their external programme, but to my surprise they don't.
Do any of these look interesting?
-=Steve=-
B.S., Info Sys, Charter Oak State College
M.A., Educational Tech Leadership, George Washington University
Doctor of Health Education, A.T. Still University, in progress