Myntra.com — wrong product cosmetics

Address: Bhopal, Madhya Pradesh, 462011

I have purchased bobby brown lipstick via order id [protected] [protected] worth rs 1800/- from myntra but when i opened it contained another cheap company product.
Its non returnable item ...
Now i have to call them again and again and wait for a mercy word from them a to get my money back...
They are asking me to wait for 72 hours
They dont have proper system for returning non retyrnableitem while its a mistake on their part