Ekart Logistics — Returned but not depicting

I returned my cat walk heels which i ordered on myntra and delivery boy came and collected them but i didn't receive any confirmation message and instead i got return pickup failed when i called him and asked he said that's not an issue it will be resolved in few days but it's been 10 days and the app showing it as product delivered where the product is picked up and i didn't receive any refund again i tried to call him but it's asking for pin which i amn't aware of