"Missing" characters

Greetings everyone!
I logged into my account after a six month break and found out 2 of my characters are missing on Icecrown server. I have been leveling them with 2 of my friends and they both say that they still have those 2 characters of mine on their friend lists. The characters are not visible on my list of made characters, but all the other characters i have made on Lordaeron are still there.
I checked login history for my account and nobody has logged in since the last time i played (which was six months ago). I also checked on armory and both characters are still there with the same gear from the last time i played on them. When i go to character restoration it says that i do not have any characters that require restoration on Icecrown.
Any tips on what I can do to get them back?
Thanks in advance!
PS both characters are/were level 47