Amazon Return Issue – Refund Pending After USPS Shipment

I ordered a pair of jeans from Amazon for $29, which my wife bought for me as a gift. When I tried them on, they were too small, so we arranged a return and used the shipping label that Amazon provided. I shipped the jeans back via USPS yesterday, and I have a tracking number showing the return is in progress. My clear expectation is that, once the return package is delivered, Amazon will promptly confirm the return and issue a full refund of the $29 to the original payment method. I request that this refund be processed without any delay as soon as the returned jeans are received.