Has anyone heard of Expo Talent?

I guess that I signed up for it online months ago regarding modeling. And a ffew days ago I listened to a voicemail from a man named Melvin I couldnt understand his last name. His accent was very strong and Im just American so I couldnt understand him that well, But he said that he would like me to go to some castings. Has anyone heard of this? Is it a scam? I keep trying to call back,