Myntra.com — No resolution provided by them on adding alternate email and phone number

I have been reaching out to myntra.com as my brother Rushil Kumar is not able to place order on myntra( incident number IN[protected]) He had added a gift card of Rs 3000 and wanted to proceed with shopping using that. He is currently out of india hence his number is not functional so he raised request to add his email.he tried adding his email ( [protected]@gmail.com)himself but becase of 2 factor authentication, otp was sent on his phone number which is currently not functional. He needs to place an order but is unable to do so as otp is sent to his number but myntra customer care has been closing the request without providing any resolution. Please ask myntra to either resolve his request or give back myntra gift card to him.