think its a collection agency, have had one calling my cell phone forever, never answered it see this all the time, if its not the person they are looking for they will continue to call, harressing etc. they claim you owe this debt when its other info they are trying to get.
They have left me messages saing " We need to speak to your lawyer concerning your upcoming case" they try to panic you into calling back. Dont even bother waisting your time calling back. they will continue to call more.