Myntra.com — Refund not received-myntra

Requested for refund of two amounts on 16.06.2020 and till date haven't received refund in bank account. Have contacted to customer care via mail and calls numerous times but their laid back attitude have only caused harassment to me. Myntra acknowledges the fact that stupid error has been made from their end that refund was initiated taking my debit card number as my account number. However, no action has been taken from their side to correct the same and issue the necessary refund. Also, the team had escalated the issue and ensured a call back in 24 hours, and guess what till date haven't received the call as well. How pathetic is their customer service! I want immediate redressal of my grievance.