Review unclaimed surplus

My mom used to work for the metal industry in the 80`s and passed on in 1992 due to sickness cause by stress and depression from my father`s death also in 1990 due to Car accident of which we never claimed any surplus for both my parents and we had to be raised by my aunt and leave on foster Grant which was R520 at that time and never even finished school because it was hard for my Guardians, I grew up and tried to find out why my mom never got anything form the surplus and my dad never got any money from the RAF but Unclaimed benefits department said I have no claim. BUT HOW can this be when we had a very bad upbringing me and my brothers then comes this.WE REALLY NEED HELP PLEASE,so that we can also have a second chance of life.