After hearing or with the consent of the insurer and in addition to or in lieu of the suspension, revocation, or refusal to renew any certificate of authority the commissioner may levy a fine upon the insurer in an amount not less than two hundred fifty dollars and not more than ten thousand dollars. The order levying such fine shall specify the period within which the fine shall be fully paid and which period shall not be less than fifteen nor more than thirty days from the date of such order. Upon failure to pay any such fine when due the commissioner shall revoke the certificate of authority of the insurer if not already revoked, and the fine shall be recovered in a civil action brought in behalf of the commissioner by the attorney general. Any fine so collected shall be paid by the commissioner to the state treasurer for the account of the general fund.