Due feedback from players the item has been made refundable. However, normal refund conditions still apply.
Since you already equipped it the refund timer has been confirm pop-up removed by yourself so they’e not going to help.
Myself in the other thread:
"If you have feedback about the game I recommend both of you to post at the Dungeons raids etc forum or use the ingame suggestion box.
Previously it had no refund timer at all and was changed due significant feedback. Maybe they’ll change additional things like the colouring, names or even better the location of the NPC selling this because simply attaching a refund timer doesn’t seem to work good enough yet.
He can keep his ticket open if he wants, but if his refund is granted this means everyone must be granted a refund 
we’ll see what happens then."