I'm Demanding a $64 Refund After GAP's Warehouse Lost My Second Item

I purchased 2 jackets through the GAP Turkey online app on 06/07/2026. Due to a size mismatch, I decided to return both products without ever using them, with the tags still on and in perfect condition. On 06/18/2026, I sent both items together through Yurtiçi Kargo, in the same box the products had originally been shipped to me in, writing the return codes I generated for both items on the box.
The box was securely taped on every side when handed over to Yurtiçi Kargo, and if any product had been removed, the box would have shown visible damage. Despite this, on 06/22/2026, I received a notification from GAP Turkey stating that only one of my products had been received as a return, with a refund issued for that item accordingly. My other product, a $64 pair of denim jackets/jeans, was not refunded.
Following this, I called customer service a total of 3 times. Each time, I was told that a case had been opened for review. Most recently, I was informed that they had checked the warehouse camera footage and that only one item came out of the box. In other words, even though I sent both products in the same box with the return codes written on it, and even though the package was delivered intact, the refund for my $64 denim jacket was never issued.
I am requesting that the $64 cost of this product, which I returned to GAP Turkey, be refunded to me immediately. Since there was no report of any damage to the package during shipping, the problem stems either from negligence in GAP Turkey's return warehouse processes or from some irregularity occurring internally, and ultimately it's the customer who ends up harmed. I want this problem I've experienced to be resolved, and for the processes to be reviewed to prevent similar situations from happening again.