First of all I'm in US. I'm replying your message based on the US experience. Your mileage may vary.
I think you should go to the nearby police station to record the incident everytime she violates the visiting schedule specified in court order. If this happens time and again, you'll have to go back to court to file a complaint. Judge will listen to you and force her to follow visiting schedule. Violating a court order is serious matter. The way you do now will never work. I think she enjoys emotionally torturing you like that. Though laws tend to protect women and children, you will win this one if you take steps methodically.
Good luck