enchantment of item turns to disenchantment

i was leveling my enchanting skills until this unexpected things happened....

i clicked my enchanting tool box then clicked enchant chest - glorious stats.. clicked it to my grievious wyrmhide chest, after that enchantment my chest lost and turns into a sha cystal...

can you help me get my grievious wyrmhide chest part back?

ign: azawakh

Sadly they do not offer return of items, I'm clueless to how this may have happened but I'm sorry for your loss.