I had the same issue. They had info about our car , I hung up on them. I called Walmart (as it was showing up as Walmart on caller ID), it was not a number of theirs. Then I called the Sheriff's Office to report it. The next time they called, I informed them I had called the police. I have not had any more calls from that number. But now my husband has gotten a call from 866 887 8252 on his cell. Also about our car.
Called today 3/12/14, caller ID said "Walmart". When I called back, I got the "our office is now closed message". This is obviously not Walmart and is some kind of crazy scam!