"Vacation Getaway" telemarketer. Sounded like live caller at first...said something like "Hello? Hello? Oh, oops, pardon me! Something was going on with my headset!" then went into lengthy pitch without acknowledging my attempts to break in to ask to be put on their Do Not Call list.
Answered, no response and call ended quickly. Later that night I had fraudulent activity on my cell account, including the purchase of 7 Iphone 7s and various account changes. Luckily my provider caught it and cancelled the purchases but I'm still trying to sort out all out.