Myntra.com — Multiple times debit but didn't get refund yet

Address: Mumbai

Website: Myntra

I have made payment through swiping my card and amount got debited twice but myntra claimed that they didn't receive it and i had paid cash also as myntra said that i would get the refund of card transactions in 7 days but i haven't received it since January 2021 and also they asked me to contact bank who claimed that the money has been credited to myntra. This disputed transactions is not coming to any resolution . Don't know where's my money has gone to.