Called my Do Not Call registered cell. Left no message

I don't answer unknown numbers, just recording this one called.

Received a call. Unknown number. Did not answer. No message.

Message started out with "Do not hang up,,, and I hung up.

Called our office landline during normal office hours and a man's recorded greeting came on making an offer to earn $10,000 or more over the next 14 days if you press 1 and to never hear from him again if you press 2. We pressed 2. Call ID Displayed "5402771916" "540-277-1916"