Email provided by
@Walter White seems correct. I think it is managed by the MD desk and handled by resolution team which is the last desk.
Make sure to exhaust remedy as per the complaint resolution matrix, i.e. 1. Premium Experience 2. 1st escalation to nodal officer 3. Principal Nodal officer
If PNO does not do anything then in such case suggest reaching out to MD's Desk. After this fails you can go to RBI Ombudsman.