Myntra.com — refund amount not received. amount sent to a bank which does not exist at all

Website:

Myntra

I was informed the refund amount was transferred to my bank account.
But while checking with myntra i came to know that the bank account was different.
I contacted the bank personal.
They informed me that such an account doesn’t exist in there bank in anybody’s name. They also said that the transaction will be a 100 percentage failure in such a case.
But when i contacted myntra regarding this.
They are saying the transaction once done is done even if it’s a failure or success. So they wnt refund my money.
I need to raise a complaint. But myntra representatives are saying no complaints can be registered or no money can be refunded.