A final finding or order rendered in any proceeding before the insurance commissioner pursuant to N.H. Rev. Stat. § 417:10, to the effect that the defendant has engaged in an unfair insurance practice, shall be prima facie evidence against the defendant in any action or proceeding brought by any consumer against the defendant under the provisions of N.H. Rev. Stat. § 417:19, I. This section shall not apply to consent judgments. No consumer may recover more than once from the same supplier for the same act or practices.