Adidas — Related to refund

My order number is AIN03658356 was delivered on 3rd August 2023, amount is Rs. 3599. This order is cash on delivery. Just because size is too large return is requested on adidas app on 4th of august 2023. Next day, on 5th of august 2023 item was picked up from my doorstep by blue dart delivery person. But till now I didn't get any confirmation mail as well as refund. I raised complaint also but I didn't get any reply by concerning team. As it is more than 2 days, I didn't get any refund. Please provide proper detail related to refund how can I get whether in app wallet ( in app there is no wallet kind of thing ) or bank account (no mail related to bank details).