You can approach the Indian courts for protection and custody of your minor son. Since you and the child are presently in India and the child is of very tender age (about two years), Indian courts have full jurisdiction. In such cases, courts give primary importance to the mother’s care unless there is strong proof that she is unfit. From what you have described — abandonment, lack of emotional and financial support, cancelling your return ticket, and no contact for long periods — your position is legally strong. It is highly unlikely that the father would get custody of a child so young. At most, he may later be given visitation rights.
You can file a child custody and guardianship petition in the Family Court at Ahmedabad or wherever you are currently residing. You do not need to go back to the USA for this.
For OCI of your son, normally consent of both parents is asked. However, when one parent is uncooperative or absent, you can apply with an explanation and supporting documents showing abandonment and the dispute. In many cases, authorities accept a single-parent application, especially when there is a court order regarding custody or an affidavit explaining the situation. Once you obtain an interim or final custody order from the Family Court, OCI processing becomes much easier even without the father’s signature.
You will not be at fault for keeping your son in India merely because OCI is not issued yet. The child is with his mother, who is the natural guardian for a child of such young age. There is no legal obligation to send the child back to the father, particularly when he himself abandoned you and cancelled your travel.
Regarding your belongings and documents in the USA, through court proceedings you can seek directions for return of your personal belongings, documents, and any items given by your parents. This is commonly addressed in matrimonial and domestic violence related cases.
A case under the Protection of Women from Domestic Violence Act can be filed for emotional abuse, abandonment, financial neglect, and harassment. Through this you can seek protection orders, monthly maintenance for yourself and your child, compensation, residence-related relief, and return of belongings.
If you do not have money for a lawyer, you are entitled to free legal aid from the government. You should visit the District Legal Services Authority at the Ahmedabad District Court or Family Court complex and request free legal assistance. Women and persons without sufficient income are entitled to this service. They will assign you a lawyer without cost.
To summarise clearly:
You can file a custody case in India.
You can get a free government-appointed lawyer.
You can apply for OCI even without the father’s consent, especially after a custody order.
Keeping your son with you in India is not illegal.
The chances of the father getting custody of a two-year-old child in these circumstances are extremely low.
Indian law strongly protects the mother’s custody of very young children unless there is serious wrongdoing by the mother, which is not present here.
Your immediate steps should be:
Approach the District Legal Services Authority for free legal help.
File a child custody/guardianship case in Family Court.
File a domestic violence case seeking protection and maintenance.
This will legally secure both you and your son.