can i ignore rcr

my husband is impotent and our 2.5 year old marriage never consummated. his parents over interfear in our life as he is their only child. despite my multiple objections to his WhatsApp chat flirtations with a married ex colleague, I found he was still message chatting a lot with her. this leads to big fight and our families got involved and made it bigger. now he left me and went without a word and starts with his parents. after 3 months of living alone now I have shifted with my mom and bro. I tried contacting him many times but finally he cut communication. he has filed rcr case. I don't want to commute regularly from Chennai to Kanchipuram (court location) and spend on lawyers. he has probably filed it to escape divorce complications in future. can I just become ex parte? or can I fight it without lawyers. or can I safely ignore it. if I apply divorce will I get the marriage expenses of 22 lakhs back.