Help!

Hello, my mage character accidentally right-click on the white cloth armor belt in the bag and replaced my FrostFire belt. While cleaning the backpack, he accidentally sold the FrostFire belt as garbage to an NPC and then went offline. After logging in to the character again, I realized that the FrostFire Belt was missing. It is no longer possible to redeem the belt, and it cannot be exchanged for FrostFire Belt through mission items. Please help me restore the FrostFire Belt. Thank you.
account number:nicolas1987
role name:nicolasboss