Myntra.com — Wrong Product Delivered - Sent 1 cap instead of 3 products

I placed an order of two sweatshirts and a top with Myntra on 20th October 2020
Order Id is 1155085 [protected]

Instead of these 3 products, I received 1 single cap on the 1st of November. I registered a complaint on the same day.
I have called and written multiple complaints to Myntra sine then . It has been 20 days. Now they have the audacity to tell me that they can't do anything because all products go through quality check and then they told me that my claim in denied.
So basically they are stealing from customers by sending them wrong products and refusing to refund! Why would I go through this two weeks of mental harassment if I had received the correct order?

The bar codes on the cap I received are [protected], [protected].

They are refusing to refund or send the correct products. I
I am fed up of registering complaints to them. They have caused so much trouble and disturbed me mentally.
I want my refund, they cannot steal from us .