Section 28. If, upon inspection of a schedule specified in the preceding section or upon any examination or investigation under section four, the commissioner is satisfied that a company is making a practice of unduly engaging in litigation or of unreasonably and unfairly delaying the adjustment or payment of legally valid claims, he may, after a hearing to the company, make a special report of his findings thereon to the general court. Nothing in this section shall affect the provisions of sections five or six or the right of the commissioner to proceed thereunder.