civil suit

Plantif had filed a case against my mother and other relatives in 2016.unfortunately the case has been decided against us due to non apperance in the court.my mother has been expired in 2000.so further the summons were deliverd to my brother but not to me. How i can handle this case ?how i can take stand ? What i can do? Can this case be dismissed?how the situation can come under my control? What steps should i take?