Passport Office Delhi — Not picking the call or replying to mails

I'm trying to call RPO delhi since 2-3, days and also mailed them regarding my inquiry about my passport application closure letter, my passport application has been closed a week ago but i didn't receive closure letter yet, and didn't have any update regarding the same!! I want to apply again for the new passport but due to closure letter I'm not able to, now they're not receiving calls or replying to mails!! Please help !! As it's very urgent for me..
Thank you