Accidentally purchased an item i already have in game with coins

Legguards of lost hope - would like a refund pls before 24 hours is up

also accidentally purchased three items to transmogrify that doesn't look in game as shown on wowhead, Blood - Soaked Saronite Stompers & Grinning Skull Greatboots & Belt of Broken Bones

my account -> support. There is "Item misbuy" category. Fill up the details