Who called from 4152313773

Called and I didn't answer. Went to voicemail but didn't leave any.

Robocall for a "vacation" blah blah. First starts off with "This is XXX from the customer service department. Can you hear me?" It sounded like a genuine voice, so like a sucker I replied "Yes". Then he started with the spiel about the vacation. I hung up.

Caller ID: SAN FRANCISCO, CA
Did NOT leave any message.

Just called but silence when I picked up. Calling back, busy.

Called my cell.  No msg.  Blocked.