What can I do about unlawful visitation and interference?

Generally, your ex-wife cannot refuse to comply with a court order for parenting time or visitation because she does not agree with it. You should keep a log of each missed exchange, including dates, times, messages, and witnesses. Continue to communicate in writing as calmly as possible. If there is no court order or the order is ambiguous, it may be more difficult to enforce a specific schedule until the court enters or clarifies one. A parent’s refusal to send children to school may raise separate concerns, especially if children are required to attend school under state law.

You may be able to file a motion to enforce parenting time, a contempt petition, or an emergency motion if the children's safety, schooling, or well-being is jeopardized, depending on your situation. You can also call the school to confirm attendance records and talk to a family law attorney about what your best next step is in your state.