Myntra.com — Refund hasn't initiated even after calling for weeks

I have called Myntra support twice from London and the person who has ordered also contacted them many time(6-7 times).I ordered shirt from myntra online but cancelled it on 28th April, and then got a message that will get refund back within 3-5 days. After that on 6th May I called them again but they sad wait for 24-48 hrs, again from 6th May onwards multiple times calls has been done to follow up on the refund but nothing happened. Every time they ask me to wait for 24-48 hours. It's been days but nothing has happened. I have requested a refund but they are just beating around the bush.