If any person refuses to attend or testify or produce any writings or things required by any such subpoena, the Commission may petition any court of record in the Commonwealth for an order compelling such person to attend and testify or produce the writings or things required by the subpoena before the Commission. The court shall order such person to appear before it at a specified time and place and show cause why he had not attended or testified or produced the writings or things as required. A copy of the order shall be served upon him. If it appears to the court that the subpoena was regularly issued, the court shall order such person to appear before the Commission at the time and place fixed in the order and testify or produce the required writings or things. Upon failure to obey the order, such person shall be dealt with by such court as for contempt of court. All process in any such case may be served in the manner prescribed by law for service of process in civil actions.