Problems with Legion Helm on Marketplace

Hello guys. Help me please. I bought legion helm from marketplace: http://wowwiki.wikia.com/wiki/Legion_Helm
I saw there is: ''random bonuses'' so I thought I will choose bonus if I buy it because I need Legion Helm of the Beast. But... Wtf? I opened mail and got my helm. I got Legion Helm which gives me only armor, no bonuses. Do you know how to change it? How to get bonus that I want? Because Legion Helm without bonuses with only armor sucks. Thanks guys and sorry for bad English. I`m from Poland. P.S. I really need this helmet because I`m 60 vanilla twink.

You can not change it. Items with random enhancements don't work properly when obtained from marketplace.