1. If your father died leaving his self acquired property then you did have due share in it.
2. However if he died leaving his ancestral property you are rightly deprived of.
3. However in any event the property left by your mother is liable for equal division among all the brothers and sisters if she has died without any Will.
4. So to claim your share in the property left by your mother you can file a suit for partition and seek injunction on sale of remaining properties.