As per checking with the order details of the buyer's order is that it was initiated to be returned to you on March 24, 2021. Don't worry as you will not be penalized due to it's not your fault as indicated here is that your buyer is not available in his/her location you may advise the buyer to re-purchase again to your shop as the mode of payment of the buyer is COD and the payment will not push through due to it is already initiated to be returned to you.