Any action to enforce a claim for damages under section 59-1609 shall be forever barred unless commenced within four years after the cause of action accrues; Provided, that whenever any action is brought by the Attorney General for a violation of sections 59-1602 to 59-1606, except actions for the recovery of a civil penalty for violation of an injunction or actions under section 59-1609, the running of such statute of limitations, with respect to every private right of action for damages under section 59-1609 which is based in whole or part on any matter complained of in the action by the Attorney General, shall be suspended during the pendency thereof.