Intekal registered by someone

My father had some paternal land in his village. He died last year leaving behind four legal heirs :My mother, my elder sister, my grandmother and myself. . He made a will in my mother's name which we got registered after 3-4 months of his death. All four of us agreed on the will and had no objection. At a later stage, while purchasing some more property, we came to know that someone had entered an intekal of my father using my mother's name and got all of ours names entered falsely without our knowledge. On enquiring further, the tehsildar and patwari suggested us to file an appeal in the court but also said to write an appeal to the sdm to make a correction which we did the next day. It has been almost 8 months since that. It turns out that my father's sister i.e. my aunt had falsely used my mother's name and got all our four's names entered there without our knowledge. We feel completely cheated. These are the people who agreed to the will and we spend a whole lot of money, time and energy in getting that registered.Although thr people at sdm office assured us that the correction will be done, there has not been any advance in the case. Can we file a case against my aunt? Are we legally protected? Is the will supreme or the intekal(note please that the will was registered after she got the intekal registered as we did not know something like this would happen) please give me some advice on what we can do? -Abhijeet (18 year old boy)