left no number. when i called back they said it was the irs and asked for information

Called back the # 732 226-7545 Robert James...caught them in lie about being an IRS agent. They said I had a warrant issued for my arrest...Once I started to laugh and call them on their scam they quickly hung up.  Person at other end said their name was Robert James ID # 17173...This # has been reported to the police.

Just got this one also.  Caller ID "Keyport NJ,  1-732 226-7545".  Computer/accented voice with no "v"s left a msg:  " ... a us treasury intending your serious attention. Ignoring this will be a intentional 2nd attempt. To awoid initial appearance before a magistrate judge or a grand jury for a federal criminal offense. My # is 732 226-7545. I repeat  732 226-7545.  I advise you to cooperate with us and help us to help you. thank you."

This number called me 5x yesterday : 4/6/15 said his name was Dennis Gray - very thick foreign accent (India/middle eastern?).   Didn't mention our names - just "official. 2nd offense, etc threatening irs...."   sad that this is allowed.

So annoying, where can I stop these annoying calls?  Leaves no name just same info as listed from other callers.