The DNC registry is for telemarketers, meaning sales, meaning all debt collectors are exempt. This fact was not kept secret from you when you registered your numbers. Attorneys general and the FTC are valid complaint venues which help the publc good. But understand that you must confront collection agencies directly if you dislike their treatment of your privacy and consumer rights.
If you are receiving misdirected or abusive calls from a third party debt collector, you may find relief in the provisions of the FDCPA, which regulates collector behavior. Learn your rights and first response tactics at FTC-dot-gov. See also your state laws for additional support. Texas debt industry laws are stronger than in most states.