Ancestors property - Case delayed

Dear sir/mam

my father has 3 siblings ( 2 are female married )... all the property is in the name of my grandfather ... now we have applied for division of property as per law ... it's been more than 2.5 years still going on .. court asked my father siblings to come but every month they come up with excuse and verdict getting delayed....We have sent notice multiple times through our lawyer still feels like nothing is moving...and our lawyer won't even object there absence ...

what is the solution is this kind of case usually takes this much time ... anyway I can speed up this process ...