Need to help my uneducated my mother to get her right so advise

Dear sir Need to help my uneducated my mother to get her right so advise me My husband Left me on 1992 I filed Case on 1993 for maintenance Assam My husband Left me for reason last 3rd female child born by him, he need male child Abhayapuri court given maintenance 600 for 2 female child and for me to survive he filed Divorce on 17-09-98 in other state WB jalpaiguri without my Knowledge On Case order no 35/93 court Abhayapuri Assam recorded he was tried to remarry and agreed he has married he is working railway Ex-parte judgment given by jalpaiguri court on 22-01-02 after 1223 days 4 year She comes to know thought RTI by railway on 20/09/2011 after 3530 Days 9.6 year She Apply for certified on 20/09/2011 after 11/01/2015 1207 Days 3.3 year She comes to know on 11/01/2015 after 4737 days 13 year 1207 Apply for certified copy recevied on 25-02-15 Can she file Ex-parte judgment injunction now, if yes, advice steps what to do where to file what to file Divorce filed on 17-09-98 1nd child female name as per railway record on 2010 Payal das age is 17 born 1/1/1993 so the child is born before Divorce 6 year he has relations with other women when I filed case on 1993 for maintenance Assam he was living with other women 2nd child Male name as per railway record 2010 Mrityunjoy Das age is 13 born 1/1/1997 so the child is born before Divorce