I got a call from this number - they said they were "Mega Million" and wouldn't answer any other questions.

Stupid scammer !

We have received daily calls from "John White," then "Dave Miller" and that we won 3.5 million but had to pay 499 in taxes (through a Wal-Mart card). We are filing our complaint with Police.  First it was "Mega Millions" then "Publishers Clearinghouse."