Call the court, ask them if they can find a court order with your names on it. Tell them what you have said here and tell them you think he has pretended to be a court clerk and has forged court orders.
If he has done that then you will probably get rid of him for a few months while he is in prison.
You need to apply to the court for a prohibited steps order.
Ask ex for a copy of his court order.
You would have got a copy of his application too, listing why he is taking you to court. You would have been told you must attend.
I have had a lot of email conversations with carcass, however, these were during a section 7 investigation/report and after meeting her 2/3 times in person at their offices.
You would be asked to log in to view each email on a secure network, for safety... Although a few times our officer forgot to do that.
I would contact carcass and ask them too if their contact exists on their system.
I would apply for a prohibited steps order to prevent him taking her outside of contact times.
I would also apply for a child arrangements order to specify these times.
I would also apply for a non-molestation order to (hopefully) prevent him from from verbally abusing you and dragging your child away and hurting her.
I'd ask for a section 7 and a wishes and feelings report to see how this is affecting your child.
Could you move your daughter's school? You need a school that can support her, give her counselling and work with her about her feelings. They don't sound like they want to help your child.