Myntra.com - Debit card was debited twice. Refund not receives

My account was debited twice for order no : *******-*******-*******
An amount of **** was debited twice by card machine provided by delivery person.
Transaction date is : **/**/*****


Response from Myntra:
We have validated your transaction for the order number *******-*******-*******, we have received only one-time payment for the mentioned order, if your amount was debited multiple times, kindly check with your bank support team.

Response from bank:
We wish to inform you that we have registered a complaint vide service request number SR*********, to verify the transaction of ₹ *,***.** dated December **, ****.

As per VISA guidelines, we will request the merchant to provide the charge slip pertaining to the transaction. If we do not get the charge slip from the merchant, we seek help from VISA and raised a 'chargeback' on the disputed transaction.

The charge back leads to either of the two results:

The dispute is settled in favour of the customer - this means that the customer's savings account gets credited
The dispute is settled in favour of the bank - this means that the charge is payable by the customer and documented proof will be provided by the acquiring bank.

Note: My bank wants myntra to privide a charge slip for the transaction to bank so that they can resolve the issue and i can get my money back. But myntra is not responding at all. They have plundered my money. Also very bad customer support.
I have attached the bank statement showing multiple transaction for the same order. Transaction date: **/**/*****
Amount ****