My Soon-to-be Ex Husband Filed A Rebuttal For A Order Of Protection And Lied In Court

I filed for an Order of Protection in Illinois against my soon-to-be ex husband and included our minor son and my parents on there since my parents currently have guardianship over our son. The day after my ex got served the papers, he filed for a rebuttal to have our son and my parents taken off of the Order of Protection. The papers were mailed to me, but I never got them so I never knew I had to be in court to appeal it. The judge granted good cause and the three people got removed from the Order of Protection. However, the papers were delivered to a protected address, and I learned that my ex lied under oath in order to get the people removed. He told the court that it was his weekend with our son, but there are no "weekends" with either parent, and there were no plans to even see our son until after the rebuttal was granted. Even then, my ex called my dad and only asked if my dad could bring our son to see him on Saturday, not stay with him for the weekend. I have spoken to my mom, our son's main caretaker, and she has confirmed this. Also, when I went to the courthouse to ask what I could do, the people in the Circuit Clerk office told me tough luck and "we don't control the mail" so there is nothing I can do. There is a plenary hearing set for December 27th for the initial Order of Protection that I filed. What can I do about this, if anything?