Principal nodal office
pnohdfcbank@hdfcbank.com
You can also try mailing cc grievance redressal of hdfc.
Per HDFC below is the way to reach out to RM
You can use the RM Connect Service in 3 Ways:
1. Give a missed call on 70433 70433 / 70433 38199
2. Or SMS "Call me" to 70433 70433 / 70433 38199
3. Or Login to the HDFC Bank Mobile Banking App >> Go to 'Menu' >> Click on Programme Name i.e. Imperia/Preferred/Classic >> Click 'Request a callback from RM'