Myntra.com — regarding refund for a cancelled order

I cancelled an order in myntra.com, i was supposed to get refund of rs1333/-
My order id is[protected]-7273501
The refund amount got credited into my account and immediately got reversed into myntra's account with the same reference id.. But myntra team is saying that we successfully credited.
I contacted the bank and they said that the amount got credited into myntra's account.
No proper investigation by the myntra team that they received the amount or not.
I have the bank statement and messages with me