Complaint Review: Phillips-Cohen & Associates

My parents received a phone call today from these people. I called them back and they told me that I need to pay them for a credit card debt. I think the debt is mine, but I dont know what to do. I'm scared to pay them anything because I'm not sure they're going to pocket the money. She told me that they sent a letter saying that I owe them, but I still havent gotten it. Can some one give me some words of advice? thanks

Herb
Woodbury, Minnesota
U.S.A.