Land Grabbing in India

I am writing to seek urgent assistance regarding a matter of grave concern regarding my ancestral property. I recently discovered that there are attempts to sell this property without my consent or that of my family members. Despite informing the broker that this property is jointly owned and not for sale, they persist in their efforts to proceed with the transaction. Complicating matters further, this property belongs to an NRI (Non-Resident Indian) who resides overseas—myself. The individuals involved in this unauthorized sale are well aware of this fact and are exploiting the perceived delays within the Indian judicial system, stating that even if legal action is pursued, it could take years for justice to be served. Given the urgency of the situation and my geographical distance from India, I am seeking advice on the most effective course of action to prevent the registration and sale of this property. Engaging a lawyer and obtaining a stay order has proven to be a time-consuming process, and the sale may be finalized before legal intervention can be completed. What steps can I take, while residing overseas, to swiftly halt the unauthorized sale and protect the rights to my ancestral property? Any guidance or recommendations would be immensely appreciated.