Uncle & his son forcebly not allowing to construct our portion
>This property is in the name of my Grandma & before her death she did not make any Will.
>My father has 4 sisters (who all are married & well settled) & one younger brother (married)
>Our property is rectangle shaped & mutually divided lengthwise.
>My uncle has built their portion completely & now not allowing us to build our portion.
>What they want is to use common entrance through our part of the land & also want to park their vehicle at our place.
>Because of which we are not able to build staircase & unable to capture the roof which is common & our portion is empty.
>Unfortunately my all aunts support my uncle because of which my parents are forced to spend their life in a single room.
>Last but not the least my uncle & his family (specially his Son) are extreme abusive & do not think twice to become violent on my old aged parents.
Please suggest what shall I do to help my parents as elder daughter.As per my aunts as my parents doesn't have Son so they do not need much space to live their life.
Please advise what can I do to support my parents in this crisis as they are feeling very helpless.