According Islamic laws ancestral properties are pass through. Your mother or uncle don’t have the right to sell there ancestral property if next generation are already born. Please file a case of cheating against your uncle and buyer and will negligence against sub registrar. please refer to this case [https://timesofindia.indiatimes.com/city/nagpur/land-deal-case-court-rejects-godrejs-plea/articleshow/103263147.cms](
https://timesofindia.indiatimes.com/city/nagpur/land-deal-case-court-rejects-godrejs-plea/articleshow/103263147.cms)