I'm sorry you are going through this runaround.
This happened to me as well and any time a FP store offers to ship your FOS item back to Jax as if they are doing you a favor it's not true - as of yet at least. The assistant manager at my FP store lied and said it was because they couldn't pull up the sale on their computer because it was an outlet item. The CS for FOS said it was a new policy, also not true. Keep in mind there are 2 CS numbers, one for FOS and another for
Coach. When I called CS for Coach (1-888-262-6224), she called my FP store, and since the bag hadn't shipped out yet, made sure I'd get the return processed in-store with only 2-3 day wait time at most for weekends - all I had to do was call the lying SA with my original credit card number. Miraculously she was able to pull up the sale on her computer this time, process the return and email me a copy of the transaction receipt. If the bag had shipped, I would have had to wait til it reached Jax but the CS would have made sure that store would be dinged for a complaint and mis-information.