Myntra.com — Exchange order not delivered since 1 week

Address:

Faridabad, Haryana

I paid Rs 6000 for Nike shoe and got the delivery however as It dint fit so I asked for bigger size. Its now more than a week that I am wiating for exchange order, myntra customer care says that due to some technical issues the order is stuck at their end hence they are not able to deliver. I am suffering without any fault of me