calls several times wk and no messages left

Automatated call telling me this was my final warning that my car warranty was about to expire and to press "1" for more info.  Smelled like a scam, so I decided to play with them a bit. Let the guy answer, and he asked for the make and model of my car.  I told him we had several vehicles, and if he was calling me, he should tell me which one it was for. He told me I would need to verify which one by the postcard we would have received in the mail- I told him I did not get a card and that I assumed this was warrant info was directly from the dealer? He said it was for GM.  I informed him that my only GM car was too old to be under any warranty any more, and he said it must be for one of the seven others. Seven?? When I asked him where he got seven vehicles for my name, he hung up on me.