Heirlooms missing

Hello!
I haven't played WoW for like 1/2 a year and today i just logged in to get some lvl on my low lvl characters what i started before, and i had to face the fact, that all my heirlooms are gone. My head slot, shoulder, weapon and both trinket slots are empty, and i haven't found on any other character bags/banks. Is there any way to have these items back? It took quite a long time to farm all the emblems.
The items are:
- Tattered Dreadmist Mantle
- Tattered Dreadmist Robe
- Discerning Eye of the Beast
- Swift Hand of Justice
- Dignified Headmaster's Charge
I hope you can fix it, or just have the emblems back to be able to buy these again.
Thanks for your time.

I've never heard of anyone having their heirlooms disappear on their own.
There's nothing that can be done. Change your password on your account and buy them again.

You probably lost all your heirlooms on a low lvl character that was deleted by inactivity.
It happened to me too... :C
Well, the solution is to get all the heirlooms again...
Rule is a rule, the low lvl character are deleted from the server with all its items, bank, everything if they are inactive for too long.