Without knowing the contents of complaint it would be difficult to draft the contents of a reply to the complaint. However the points to be considered are that a judgment of an officer presiding a court can be questioned in an appeal before a superior court and can not be resolved through complaint. However if a bias or malafide intention on the part of PO can be attributed a complaint can be made to the superintending court who can make inquiries and initiate disciplinary proceedings and take action as per service rules. I have not heard of any complaint being heard in open court. Therefore more details are required to assist you in drafting a proper reply.