Call (from my own area code) began with a computer generated, tinny voice saying 'because you are a very special customer of Walmart...'. Well as it turns out I don't shop at Walmart, therefore, am neither a special customer nor any other kind of customer. I let loose a stream of swear words and they hung up. I guess I'm not such a special customer after all.

My bet is it is a total scam and possibly the number is spoofed.