Agree with statements about trust, etc., and your latest response seems exactly what is needed.
I am sorry you are having to dedicate sooooo much time to this, seems absurd, considering the main reason: They are also spending time (and $$$) obfuscating and backpedaling and lying.
(You know, I am tired of skirting all around that word. )
I had spent many hours off and on for years (and plenty of sleepless nights considering what to do next) in dealing with stuff like this, although not to the degree you have delved. The first viable chance I got to homeschool we made the switch. If you need services for a child's ld, that makes it much harder, I'm sure.
Good luck to you.