Myntra.com — I couldn't receive the order due to lockdown and now not getting refund amount

I couldn't receive my order due to lockdown, the delivery agent asked me to refuse the order. After that i didn't received the refund, i tried calling at customer service two times, they asked me to wait till 72 hours but still i didn't received any refund.
They told me about some ivr call but i didn't get any call from them. For your information i refused the order on 28th june 2020.

It is not expected for such a brand like myntra,
In similar case i found better support form other shopping sites like amazon and flipkart.