Still was getting calls.  Called ARS 731 District Dr. Itasca  (630) 963-7300.  Reported the issue to them.  They apparently do have some auto dialer that they use and if you want the calls to stop you may want to call in and ask them to put you on the no call list.  I was told it will take a couple weeks for that change to become affective.  I also told them that I wanted to give them a chance to stop before I called and reported them.  I guess we'll see in the next few weeks...

They are a rip off company. There was a simple issue with my heating, and they came on a weekend and showed it as if it was a big deal.. zipped me 600 dollars and did a crappy job which was later on replaced by another heating company for merely 80 bucks.
Since then they've been calling me atleast once a week. Told them many times not to call.. but they never stop.

I called ARS for some plumbing work. They did OK job but now they call me almost every day. I told them not to call me but still they call. Very annoying people. Now, never ever will call them for any work!

Calls middle of night and hangs up.

I had ARS come out a year ago to do a health check on the furnace.  The guy replaced an igniter.  About 5 or 6 weeks later the furnace motor blew.  I had a different group come out and replace a motor.  He said that the guy from ARS should have vacuumed the motor and the area in the furnace, and didn't nor did he do a good job of cleaning anything else as a part of the furnace checkup.  Then I find out from the furnace guy that the ARS guy installed a used igniter and he knew this from the green tarnish buildup already on the one that he replaced it with.  The ARS guy even told me that when a part was green like that it was bad.  I did call ARS and complain, they had to send someone to the house to pick up the bad part and eventually they credited me for the part.  Watch out for that group!

I'm getting 1 or 2 calls from them every day and there is no one on the other end - VERY annoying!

This is ARS Roto Router from itasca - IL