You may have been subjected to something like scam  #13, as described at
http://phonehelp.2truth.com/facts.html

That site also shows how other 800notes visitors have reduced the number of telephone scams and telemarketing calls they receive.  (Links to Amazon's phone blocker devices and apps, as well as government reporting sites are also provided).

I believe it is a scam as they say that I won trip to Bahamas.