I got this too - I didn't answer; and they didn't leave a message.
What's weird is that I feel like I'm being targeted lately. Last week, I got a bogus email from "the Better Business Bureau" which turned out to be a scam.
Then, just one day later - I got a call from "the IRS" which also turned out to be a scam.
This is a lot of bs in a very short amount of time - creepy and irritating.