Myntra.com — refund haven't received yet.

I'm raising this compliant on myntra application which offers online purchase of fashion items. I had purchased a shoe of rs.1, 399 on myntra on[protected] by paying prepaid through upi, but due to some reasons i had cancelled it. They've said that the refund of rs.1, 399 will be credited to your bank account in 10 business days. I was waiting for long time but the refund was still not credited in my bank account. I had contacted them for this issue but they given a reference number[protected], with this number i approach my bank to know further but the given transaction reference number was not traceable said by the banker. The myntra saying that my money was initiated on[protected] but till now i didn't received my refund and they often says that my money was initiated but i don't know where my money is gone. Kindly file a complaint regarding this issue. Since more that 60days i didn't got my money back. Kindly do the needful.
Thanking you