You can contact the FTC online at ftc.gov or by calling 1-877-FTC-HELP. To learn more about illegal robocalls and what the FTC is doing to stop them, visit ftc.gov/robocalls. You may file a complaint with the FTC and/or the National Do Not Call Registry.
If you want to learn more about unwanted calls and caller ID spoofing, see the FCC consumer guide pertaining to robocalls. You can learn more about the FCC online at fcc.gov/consumers.