Ahmedabad Municipal Corporation transferred ownership of Joint property in a single name without doc

Some corrupted officials of AMC transferred only one name as owner in property tax record in 2008 which came to our knowledge in 2013. (1) RTI made to AMC to provide transfer documents and application received. (2) reply received from PIO : original records are not traceable/available (3) Matter was referred to GIC. Same officer of AMC dumped the responsibility of transfer process on other department and further declared that no application has received any time. This official did not answered any question of judge in 2016. For any question he replied I have not done this. (4) Annoyed judge asked officer to submit affidavit (5) AMC officer submitted false affidavit in individual capacity by hiding the process facts and truth of records. (6) complain made to Vigilance of AMC (7) Vigilance of AMC created a disputed report without addressing recordsany irregularities of process. (8) Further submitted report to irrelevant authority of Govt of Gujarat and provided Vigilance clearance to this official before retirement. (9) Further complained to PMO office thrice. But Vigilance of AMC is providing misguiding answers with different version. (10)As on today Vigilance of AMC is refusing to state that executed process is legal and repeatable (11)It seems As we understand roll of vigilance is not to provide sheltor to corruption but to investigate process violation. (12)Either Vigilance of AMC does not have investigation skill or intentionally encourage corruption Please advice what further can be done