Allied Interstate Faking their name Columbus, Ohio

On Saturday a phone call showed on our Caller ID as Wal-Mart. When I answered it was the people from Allied.  I consider this  highly unethical and told them so. Their reponse was- "oh well we do work for Wal-Mart too."  I have written Wal-Mart with copies to the Florida Attorney General, the FTC and the FCC (since they are misusing a telecommunication device).  I answer all calls that come in except those placed by an automated system which does not  connect to a real person when I pick up the phone.  If I say Hello twice and there is no response I hang up.  Do it enough  times and I block the number.  I'm not hanging on the phone for a stupid  computer to connect me.