Called  but didn't leave messsage.

Its a debit collector. See what they want. Also you can get there address and write them and ask them to send you letters and not to call you.

Called but did not leave a message. Called 3 more times within 1 hour. I answered on the fourth call. They said I owe money for a car that I've never owned in a state I've never been to. They have me mixed up with someone else; I checked my credit report just to be sure there was nothing suspicious.