They do not recognize do-not-call.  Told one of my office staff that "I owed them money" to attempt to get me on the phone.  Calling the number only gets you to the "corporate office".  Total scamsters.

Me - owner not in right now
them - I need his cell number to contact him
me - I can not give that out but would be happy to take a message
them - No, I have to have his number he owes me money and I want it now, give me his number
me - sorry but I

Click.

Found out it is an investment co.
The owner called them and told them not to call anymore and then called the FCC.

Idiot people don't understand do-not-call