Can a catholic do a second marriage without divorcing the first wife

This is  Hi just wanted to know how is the verification done for court marriage in catholic also wanna know if a married person having an affair and wanna get married can it be done in Mantralaya how do you people come to know if he is married earlier need help immediately plz As this incident has happened with me and the register person said they do not verify the parties. I am married to my husband for the past eight years n there was a lady  who took my husband to dubai later divorced her first husband n then got married to my husband in mumbai mantralaya court on 13-1-15 .I want to know what can be done as me having two children n my husband always visited us every year n he got married to this lady in 2015 n last year got twins from this lady n this lady knew he was married but now when I caught them red. Handed she is lying as she always blocked me when I told her he is my husband what can be done now as whenever I try contacting her she block