PROBLEM: My netherwing reputation.

Hi, im lvl 80 and i did the quests that were before the netherwing reputation leveling for get the mount.
The think that hapenned is that I didn't know that I was doing this quests with the reputation marked like "At War". I didn0t knew this, anyway I unmarked the "At war" but now the NPC just salutes me and doesn't give me the item that transmog me as a Netherwing NPC. I tried like everything, but the raputation doesn't go up. Is stay in neutral and that's all. What can I do?
Sorry for my bad english :c