I just realise that my Felsteel Helm and Gladiator Plate Shoulder was missing before i'm logging off.
I think it just went missing while i was playing.
not really sure whwt happen, but i'm very sure did not accidently sell it.
But I did swith from my DPS gear to tanking gear in the mid of a fight against elite mob (The final quest for Grom'tol charge axe)
So maybe during that time it went missing due to some bug or whatever.

I submited a ticket to GM, do you all think it is possible to get it back?? If yes, how long does it take for them to replace it?
I have gemed it up too, possible to get it back exactly like before?

I was using itemrack. but i swap gear during mob fight.
Anyway, will go and check it out bank later.
hoping some how the gears will be in there.

Yes a bit bizzare....

But i got it all back, i thought they will just give back my gear without the gems that i slot it, but they gem it up for me, exactly same as before.
So all is good.

if you accidently sold it, you can still buyback from vendor.
If it is not available at your buy back, you still can get it back by summiting a ticket to the GM.

Felsteel Helm can buy in AH lar.