Wrong Item

Hello, i have a small problem. I was trying to do something nice and good but was a huge mistake actually. I'll explain : I was trying to surprise my brother with a nice new item, the polearm from LK 25 HC on his feral druid. Unfortunetly , i had no idea that he literally bought the weapon on the previous night and when i logged in to equip the item i saw that he already had it....Now what i am trying to do is , i dont want the money back, but i would simply like to exchange that item with another one that he doesnt already have. I can give more information if needed but i really need some help on this to figure it out. Thank you very much !

You need to create a support ticket here, category "item misbuy" https://www.warmane.com/account/support?do=new