Complaint against bank, NBFC, system participant not redressed? Lodge complaint on RBI's Complaint Management System @ https://cms.rbi.org.in. More? Call 14440 The RBI CMS portal can be accessed here:https://cms.rbi.org.in If this link still doesn’t work, try visiting from another device or check the official RBI website under the "Complaints" section: https://www.rbi.org.in > Scroll down to “File a Complaint”