Myntra.com — Money showing credited to account in myntra but not showing in my bank

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Myntra

13 th apr 2023- myntra is showing that refund was credited to my UPI but it’s not credited yet have connected with my bank with reference no. Which myntra provided but bank is saying invalid n no refund ..have called several times myntra n had submitted complaint also but of no use ..please look into this matter it’s been so many days now…showed them my bank statement but they r just not telling