Can ancestral property deed be cancelled what is the procedure

In August-2015 my father had registered agriculture land(8 acres) on my brother name through settlement deed with out my & my sister concern (we did not signed on that papers) & actually mentioned property derived from my ancestors & now my father supporting to my brother and refusing to share the same property to us( they only enjoying property & i got married 5 years back) . do i have chance to get right on this property ? if yes,share the procedure,if you suggest for suit than in which court i have to go for suit & how much time it will take to cancel settlement deed.