May I suggest, that your families attempt to spiritually manipulate you has now failed, they know it's failed, they know you're not coming back, so now they are "playing the victims", and also victim shaming you? May I also suggest that your mother is a Narcissist, and loves the attention and pity party she receives from her "spiritual family?"
Pale, I've been following your story ever since you joined this forum. Your ex-wife, JW family, etc are toxic, absolutely toxic assholes. I would never, EVER let me kids around them unsupervised. That would be my condition of seeing my kids, that it would be supervised by me. They would NOT treat me as a sub-human being as they do you, and still get the "privilege" of seeing my kids. F' them!
The only person even salvageable in your situation is possibly your brother. He is not fully "in" yet it seems, and your planting of seeds and making him think may prove very productive. The fact that he calls you in "secret" even though he knows by JW standards he not supposed to, is very promising.
So your mom blocked your #? Feel free to block hers, along with her email address and any other social media. If she ever decides she wants a relationship with your children AND YOU, well I guess she can come to YOUR house, apologize for her incredibly heartless behaviour, and address you like a human being again.