Mach is right. She has the children, she has them right where she wants them (living in her province four hours from you), she has them whenever she wants them, you get them whenever she says you can see them and only then, and she gets you to pay her to live and take care of the children at the amount she says for you to pay. She basically has all the cards right now. Hopefully, that will change some with the divorce filing but I see you making the same mistakes again and it worries me -- "I'll just give my W everything and then maybe she'll like me again." Stop that. It doesn't serve either you or your children. Do what's best for them, not what's best for her.
