Ancestral property

Hello My grand father have 3 sons and 1 daughter First son that is my father have 2 sons that is me and my younger brother Second son that is my uncle one has 2 kids, 1 daughter and one son Third son that is my second uncle has 2 daughters Daughter of my grandfather that is my aunt had 2 kids 1 deceased and one alive Now my question is My grandfather inherited land and home from his ancestors now while we were young back in 2002 my grandfather had given all his properties to his 3 son as my father and my 2nd uncle signed to the no objection letter now all the property is in my 3rd uncles name. Since we want our share we asked them to give our share but he refused to give stating that my father have signed as no objection. As far as i know all the property was in grandfather name while he gave it to my uncle and we were minors. Now to get my share what i have to do. Pls answer this as i am not capable of fighting for this in court literally i am on street without anything to live i cant even afford to pay of documentation as i have no way to lead a proper life i seek your help. Thank you