Help , I wanna buy Gladiator Suite Druid , but it stuck!!!!

I bought Gladiator Suite DK , mage warlock , hunter, and priest. BUT, then wired thing happenned, I CANT BUY Gladiator Suite Druid , it said I need to change a new matercard, plz help , I wanna buy all Gladiator Suite stuff and hope cokx make new class pulished soon like paladin , monk

Help , I wanna buy Gladiator Suite Druid , but it stuck!!!!