Somehow cant find my old death knight

So i had this account linked to emails had a death knight undead and a blood elf priest name Lichshadow or Slaveseeker and a priest named Lichlight, somehow when i logged in a few years later the characters were just gone and i had to restart again from new character.... and my friend has a character on his friend list named C_87 something... can anyone find the missing character or is it gone forever? it was created during warmane after the transfer from molten to warmane deleted my old DK, im already at my 3rd DK... but i still want to see if its possible to restore my undead one aswell