Also file a complaint with your State Attorney General's office.
List of State AG’s offices: http://800notes.com/faq/attorney-general
Use this web site to find an attorney in your state that will probably take the case on a contingency basis (no money out of your pocket up front): http://www.consumeradvocates.org/
What the Do Not Call lists covers and doesn’t cover and why: https://www.consumer.ftc.gov/articles/0108-national-do-not-call-registry
Call Blocker
You need to buy a standalone call blocker, call blocking phone, use your carrier’s call blocker if they offer one, or download a free call blocking app for smart phones. For conventional cell phones, assign the number a letter like “z” and make no ring. You may also need to have your carrier increase the ring time to avoid having them leave a message on your voice mail.