What To Do When You Get an Illegal Robocall http://www.ftc.gov/bcp/edu/microsites/robocalls
Hang Up. Do not press 1 or any other numbers to get off the list and NEVER call them back.
Report it at http://www.fcc.gov/complaints and at https://www.ftccomplaintassistant.gov
EVERYONE should be reporting them. It is important to keep up the pressure even though nothing seems to be getting done, or else the government will just sit back and claim they are doing a good job since there are fewer complaints. These criminals need to be charged with a CRIMINAL offense and thrown in prison (Prosecute them in criminal court instead of civil penalties).