Female voice claimed to be from ESG Research Group offering a free 2-day cruise just for answering a 30-second survey. Is second or third time they've called me recently, but they never actually come back to the phone when I 'accept' the call.

Received multiple calls for a "survey" on how the national government is handling the debt crisis.  After a mechanical survey of three questions you are forwarded to an operator for a "free Caribbean cruise"  the only charges are gratuities and port tax.  Then they ask your for a debit or credit card number to secure the port tax.

Third time I got a call from this number but no ever comes on the line. Just dead air?

You must press one to get the CSR.  Then they offer you a free cruise to the Bahamas.  Everything is included but liquor, gambling, gratuities and port tax.  THE PORT TAX MUST BE SECURED WITH A DEBIT OR CREDIT CARD #!!!!!!!  WARNING.  They get around the no call list by saying it is a survey which are exempt along with charities and political robo calls.

Got a call from this number - dead air. Caller ID said Beverly Hill CA. Called number back, busy.