Unintetional waste of 9 Wintergrasp marks of honnor

Hello i wanted to ask if its possible to return Wintergrasp Commendation which i bought for 9 Wintergrasp mark of honor. It was unfortunate missclick and ruined few hours of my effort. I cant just simply sell it back to the vendor. :( Its on my character Elezakk-Frostmourne

If you can't sell it back to the vendor, there is nothing that can be done about it.