Royal Caribbean (?) Telemarketing Scam

missed a call from this number.  caller left no message.

Received call but left no message. Called them back to check. Got feedback `INVALID NUMBER' twice. Now isn't that something??????

I keep getting calls from this number, when I don't answer they hang up and call right back. I have tried calling the number back but I get a continuous busy signal or that my call cannot be completed as dialed. I just wished there was something that can be done I have registered my phone on the DO NOT CALL registry and that obviously doesn't work.

Received a call from this number. They left an automated email that was kind of cut off but sounded "telemarket-ish" by pressing 1 for more information.