My grandad bought a property in the name of grandmom,he died first,then my dad,then grandmom,grandmom wrote a will that we grandkid of her deseased son should getthe share equal to what my dad would get if he was alive,and that willcomes under1/3rd property,the siblingsofdad refuse to give us,advice

Ustadh AbdulAziz al-Haqqan
These matters should be taken to court and not me. Barakallahu feekum.