OnePlus India — Oneplus 10R order under exchange scheme

My order No M[protected] in the name of Paramjeet Singh was ordered on 19th Feb and the Blue Dart buy came on 20th with the mobile set however he could not download a particular app on my old phone kept for exchange and hence taken back the Oneplus mobile. His name is Narender Yadav and the contact number is [protected]. When I contact him he said we have returned the courier back. Till then there is no revert from any one including refund of my amount of Rs. 36619.