For your failed Blinkit transaction of ₹661 via GPay, first raise a complaint through Blinkit’s Help section in the app under “Orders > Need Help?” and mention the payment ID and date. You can also email them at info@blinkit.com. Since your bank confirms the debit, request a transaction reversal from Blinkit. If unresolved within 7 days, escalate the issue via the National Consumer Helpline (NCH) at 1800-11-4000.