Yes it is and there have also been emails sent out along the same lines. Amazon are fully aware of both.
If anyone rings ( and some companies have even managed to show a local number on caller display ) and it is something that you don't know anything about or have no connection with, just put the phone down!
Any legitimate company will call you straight back.
Even better, invest in a phone with a built in call blocker - you won't get the calls in the first place!