Hi, It sounds like you’re going through some awful things. Try to record any calls he makes to you or the children, and keep a journal or record of times and dates when he has turned the children away. Also screenshot texts that are abusive or nasty etc.
It will all be good evidence for you if he does try going to a solicitor.
I can’t say much about contact arrangements, but I’m sure someone with experience will be able to share their thoughts with you soon.
I’m glad you’re out and safe. Stay strong and have as little contact with him as you can. x