Flipkart - refund not committed

I ordered * nighties for women from the company 'Upper Collection' on flipkart. out of * nighties * were missing and the *rd was a wrong product. I got refund for the wrong product but they are not processing the refund for the other * nighties. They are again and again raising return option and automatically cancelling it by calling it a "quality check fail at your door." I called their Customer Care many times but they won't be able to refund my money for the missing items they said.