How do I file a complaint against a broker or mutual fund with SEBI?

Use SCORES (SEBI Complaint Redress System) at scores.sebi.gov.in. Register, select the entity type, describe your grievance, and attach evidence. SEBI forwards to the company with a deadline for resolution (typically 30 days). If unsatisfied with resolution, escalate to SEBI arbitration. It is free and accessible to any registered investor.