It’s not possible to delete your Irctc.co.in ID. This is a bad thing, especially for a governmental organization.
Try to contact them via https://www.irctc.co.in/beta_htmls/contact1.html and hope for a quick and clear reply.
Please note that AccountKiller.com is not associated with the business listed on this page. AccountKiller provides easy-to-understand instructions and guides on how to cancel charges and relationships from the list of businesses on our site, we have no affiliation with these businesses.