Known caller, never leaves VM, calls at least a couple times a week

Caller identified himself at "Tim from customer service."  He immediately launched into a spiel about a "free" cruise from Fort Lauderdale to "exotic destinations."  I asked him what company he worked for, and he replied, "Client Services International," then immediately returned to his spiel asking me if we were at least 28 years old.  I asked him where his company was located, whereupon he said, "Sorry you're not interested" and hung up.  When I dialed back, I got a recording with the same person's voice announcing, "We're sorry, but our survey is over.  If you would like to be taken off our call list, press 1."  I hung up.  This is obviously a scam.