If the company has gone bust, a complaint to the Enforcement Team at the Companies Office is another option. They can ban someone from being a director/involved in the management of a company, if that person's conduct has contributed to the previous company being unable to pay its debts.
See:
https://www.companiesoffice.govt.nz/about-us/our-enforcement-approach/
https://www.companiesoffice.govt.nz/about-us/our-enforcement-approach/make-a-complaint/