Agriculture land purchased in govt auction

My father had purchased 14 acre of agriculture land in govt auction (the land sold by govt was of people who migrated to pakistan) than few years later this land was sold but parallely a small piece of land was purchased (both lands are located in Dwarka district, Gujarat). Both the lands were purchased in my mother's name in 1977, we have all the relevant documents such as sale deed, fee receipts, purchase receipt. Now as my mother passed away in 2003 we initiated the process of transfering the land to my father but we found that since 1977 the revenue dept has not till date transferred it to my mother's name, neither 7/12, 8 forms are on my mothers name, still the name of the person who migrated to pakistan is shown as owner, there is no cancellation order of our sale deed also. Now the revenue dept is not giving any opinion about transferring the land to my father's name, we have been following up with revenue dept since 2.5 years. Pls guide