Called my cell phone. No message. Caller ID just says Fargo ND

Called the number back after I had answered and it immediately disconnected. Automated message says "Hello, this is Christy with Reward Redemption. You recently visited one of our affiliated websites...." Then says there's a $100 gift card for me to show their appreciation. Told to press 1 to redeem or 2 to be added to the do not call list. Chose neither option, simply hung up.