Who called from 2031292542

Had three calls today. when I try to answer the line goes dead?

Didn't recognize. Didn't answer and they didn't leave a message so. I don't ever bother with these types of calls.

They did not bother to leave a message: a sure sign this is no one I want to speak to.

They called and didn't leave a message. When I tried to call the number, I got a recording that my number cannot be completed as dialed.

A recording said I was a valued customer (to whom?) and that I get a $100 dollar gift card.  I hung up before listening to the rest of the message.  I get this same call about every 2 weeks from different numbers.