Myntra.com — return and refund of money

Address: Bangalore, Karnataka

I had ordered 3 nirthaan from mantra during the sale time.. And i cancelled one of the kurthas after placing the order but the order wasn't dispatched or shipped. They said that the refund will be initiated in 7 to 10 days, but nothing has been done or notifies through sms or mail.
The other two nirthaan was shipped and reached before time, the quality was really bad and the sizes didn't match, when i tried to place a return option, it was shown on the app that the products are still out for delivery and delivered yet. I tried to call the logistics office and they didn't give a proper response.. It's been more the 4 days and the app still shows that the products are out for delivery... I mailed myntra a complaint, but no response. I tried to call the customer service but it's been busy for the last 3 days and no reply to my messages on the app or even instagram.. It might be okay for them to neglect these issue but i'm the one who's losing the hard saven money