Myntra.com — need to exchange/return a bag

Address:

Bangalore, Bangalore, Karnataka, 400056

I ordered a mango bag a few days ago and it got delivered to me day before yesterday, however the size was pretty small and it looked bigger on the website. I went to the return option and by mistake collected insider points, now i want to exchange or return it but it has been blocked. I do not want the bag and it's a horrible policy that a customer cannot return/exchange the item he/she isn't happy with. Never gonna shop from myntra.