Myntra.com — gave wrong product without price tag

Address:

Mumbai City, Maharashtra, 400074

Myntra gave me wrong size product without price tag & now they are not doing an exchange or return stating they have provided me with the tag but it was not there in the package they gave me, I have contacted them but they want those price tag which they didn't provided for refund or exchange. I have the call recorded those calls with myntra. Kindly hep