How to enforce agreement relating to home property

Sir my father expired in1984.my grandfather and grandmother already expired.my mother came with me to her brother's home when I was 1 year old.so my Tauji was using my father's home land.i m in defence now.my Tauji got 1 plot from govt.i exchanged my home property with Tauji with that plot with 100 Rs stamp and notary signed.but my mother did not sign.after some time they refused me a to exchange but i did not make it sign by notary.now mother sold her home property to other person .i did not sign.but I donot have objection.now my Tauji put case on me that u exchanged with plot but now how u sold.first my mother asked to them but they did not agree to take.and also they bring my father's sister (05) and put another case through them to take Ur part from sold property.still three bhua ji signed but not agree to take part and two wants part.i m staying in with my mother and family. Pls suggest me.i m in tension.thanks.