I have a "Serpent Chocobo Issuance" in my inventory from the My Little Chocobo quest that I cannot delete and I cannot sell. It's a quest item that's only available from the grand company vendor for that single quest. You trade it in to get your first chocobo mount, you may remember. Here's what happened:

I bought one Serpent Chocobo Issuance for the quest and turned the item in to the quest npc, but for some reason I mistakenly went back to the quartermaster and bought another. Then I went back to the quest npc, named my chocobo, and completed the quest, but once I finished the quest, I still had the second Serpent Chocobo Issuance stuck in my inventory, not the quest inventory, but my actual inventory.

I filed a support ticket to try and get it removed from my inventory, but the response said it wasn't a bug and I should read forums / talk to people / etc. to find the answer. Since then I have re-filed the ticket many, many times, but with no answer. I can't sell it back to the vendor, I can't drag it out of my inventory, I can't repeat the quest. There's no solution I have found, and it's in my inventory permanently.

Can this issue be escalated and figured out?

Thanks for your attention.