Ancestral Property dispute in Uttar Pradesh.

Given below is a summary of what has happened in the past few years - 1) Farm land in the name of two persons say A and B. both expired. However on the basis of will of both, which unregistered,, both names A and B removed from the Khasra by order by Tahildar 2002 and the name of son of A recorded /included therein. Some mischievous elements with malafide intentions prepared a new will in the name of B of later date to earlier, bequeathing his share to aan alleged servant of B, named S. and Tahsildar cancelled the order 2002 above, and name of son of A was removed accordingly form the Khasra and title deeds reverted to the original names A and B. 2) Suffice to say all the original sales deeds of 1966, are in the possession of son of A. 3) Case contested by son of A, and hon'ble member Rajaswa parishad LKO, pleased to revert the case to the Tahsildar in 2012. but since then no news of the progress of the cas and files are not traceable and case not proceeding. 4) The question is how can the will of B in the name of servant S ,(who is also supposedly not alive but not confirmed) be cancelled and that part of the property resorted back to the original tehsildar order of 2002 in favour of son of A? Kindly do let us know of your valued opinion about the same.