@dubkash,
I agree with Jespah.
You should get a good family lawyer.
I paid for an hour of a lawyer's time when I faced a issue with our parenting agreement. Some lawyers offer a free consultation, but this always ends up being a sales pitch... if you pay you will get real professional advice and maybe someone you can hire.
Once you get a lawyer representing you, often these things get fixed rather quickly without too much cost and without having to go to court.
If her mother is playing these games... I would want a legal parenting agreement from a court to protect me.