Farmer certificate (khedut kharai) in gujarat

Hi, My father used to own agricultural land in 2008, and his name was included in the 7/12 and 8A extracts alongside my uncles and grandfather. Unfortunately, my grandfather passed away that same year. Due to certain circumstances in 2008, my father relinquished his rights to our land (Haq Tyag / haq jayo karvo) to my uncle with mutual consent. The land remains with my uncle today. We are now trying to buy agricultural land in Sabarkantha, Gujarat. However, we are not permitted to do so because my father's name was removed from the 7/12 extract, and we were unaware of the constraint requiring a person to purchase new agricultural land within a specific timeframe after giving up their status. Furthermore, we have a very limited relationship with my uncle. Are there any options left for us to regain our farmer status? Given that my grandfather's land was ancestral property, can I request a Khedut Kharai Dakhlo (Farmer Verification Certificate) from the Mamlatdar? What other options does my father have to regain this status?"