In addition to any other penalty provided by law, any person, firm or corporation which violates an order of the commissioner after it has become final, and while the order is in effect, shall, upon proof thereof to the satisfaction of the court, forfeit and pay to this State a sum not to exceed $250 for each violation which may be recovered in a civil action; except that if the violation is found to be wilful, the amount of the penalty shall be a sum not to exceed $1,000. The commissioner, in the commissioner’s discretion, may revoke or suspend the license or certificate of authority of the person, firm or corporation guilty of the violation. An order for suspension or revocation shall be upon notice and hearing, and shall be subject to judicial review.