a). Register on SCORES portal https://scores.gov.in/scores/Welcome.html

b). Mandatory details for filing complaints on SCORES:
   i). Name, PAN, Address, Mobile Number, Email ID

c). Benefits:
   i). Effective communication
   ii). Speedy redressal of the grievances

You may also download the SEBI Scores app to log a complaint
Android: https://play.google.com → store → apps → sebiscores
iOS: https://apps.apple.com → app → sebiscores