No contempt of court. He was not aware of the court order. His family members do not have receive court orders on his behalf. Also, his family members have no obligation to inform about the court orders, when you left a copy of the order with them.
Both of you are Indian parents, and hence indian court has complete jurisdiction in your matters. You dont have to go to US courts.
You do not have to report missing child. You have to file immediately Habeas Corpus in your jurisdiction High Court seeking them to produce the child immediately. You can state the facts as they are in the petition - 1. dishonored court orders, 2. Removing the child from the country without any form of intimation to you and 3) your concern about abuse based on your child's earlier statements that she desires to have regular contact with you.
G.O.P is the petition under Guardian ship act and Hindu minors and guardianship act to give you custody of the child as you are a natural guardian. Custody orders are interlucotary in nature and they can be modified as circumstances change. In your case, since divroce the child's circumstances have changed because the child has been removed from the country without even your knowledge. You can file for full/sole custody of the child now as a modification to the earlier custody orders.
Have few questions. How did your ex-husband get the child custody during divorce proceedings ? Did your child state that she actually wanted to live her father ? Per section 13 of guardians and wards act need to check the welfare and interests of child before determining the custody orders. Most custody orders went in favor of mothers in case the child is a girl. Or did you give away the custody to him by consent ?