Question

Father with Joing Legal Custody, has a son that is 11 years old and has been attending public school to this point of his education. The mother unilaterally made a decision without notification or consent to enroll child in parochail school. When the child told his father what was happening and he didn't want to go, father wrote letter to school indicating his non-agreement with this enrollment and also stated that he had joint legal custody. The school accepted the child anyway against the father's wishes. When the guardian ad litem too the case to court, it was ruled that she unilaterally made the decision that that the two need to go to co-parent mediation. What action can be taken to get the child back into the public school system where he has excelled and what action can be taken against the parochail school for violating the rights of the father?