Mother's property transferred illegally by brother excluding sister from property.

Hello I am Nima (married), is daughter of Saraswati. My mother expired on 03/05/2019. My brother transferred (mutation on land) the property (7 acre agriculture land) in his name and other 4 brothers on 7/11/2020, excluding me. When asked, my brother says that daughter don't have a share in Bidar, Karnataka state. He also mentioned that the mother left a will, however it's not disclosed to anyone yet, also he mentioned it wasnt used as a proof for above transfer. Also I challenge if it's legitimate and legal as my mother was 87 year old and in her best health when the will was written. Note: Also few months back he was asking for NOC and offering 3 lacs, which I rejected. We called the Talathi and he said a notice was published in newspapers however I have not seen it and seems involved in this. I am a legal daughter and I need equal share in the property and I am not getting any help. I live in Pune and cant travel much. Note: I have affidavit of me being her daughter and equal shareholder in the property (duly executed by my mother dated 15/11/2017, would it help?) Is the will legal? Has he made fake NOC on my name? Has a sale/gift deed done? Whom should i complain? What is the legal procedure? Thanks a lot! Nima