How to Cancel Property Khata

I will explain what happened previously and the current status 1. Our opponents gave bribe to different Govt officials and got the land re-surveyed, and got new PODI numbers. (This land was long back converted and sold to different people as sites. We have KHATA and paying the tax). 2. They did the illegal survey legally, they got it re-alienated from the DC office and prepared fake NAKSHE / SKETCH, from the register office. 3. They created new KHATA legally on these sites (using the legal documents obtained by giving bribes), and sold and registered to some guy. 4. Then we came to know that this has happened in background, and applied for the legal suit in the Revenue DC count. Then we won the case. 5. They removed their names from RTC, and updated it at Tahsildar office. 6. They cancelled the PODI numbers which was done illegally in the DC office. 7. They are almost done with cancelling the illegal alienation in DC office, which was created by giving bribe. To give that document to us, A-DDLR is asking to get the Khata cancelled first from Corporation office. 8. But in Corporation office, to cancel the Khata, they are asking to get the Alienation cancelled first and get the document. Note - We have got permanent decree from the Civil court, on the person who did all this illegally. Please let me know how to cancel the KHATA which is in the name of the person who bought it without knowing. He is not ready to talk with us and discuss.