I see you've posted several times over the last couple of months, but it APPEARS that you've tried several things, although I'm not sure of your methodology.
You would most likely need to follow the LAST RESORT TECHNIQUE, which is NOT an ultimatum (which seems to be what you tried in your first post).
So what you want to do is:
1) back off, do NOT initiate contact (phone, emails, -- don't find an excuse to talk to him etc)
2) do NOT announce your boundaries or describe what you are going to do...(don't show your hand)
3) do NOT return his every call or text, give it every 3rd or 4th and be kind of vague as to why--just be busy
3) do take care of yourself and your children...make yourself happy. do the things that make you and your kids laugh and enjoy life. It's good for you and it makes you more attractive.
