Need help with rep quests

Hi i just bought some rep with sons of hodir with emblems and i didn't knew that
i need to do chain quests for getting the rep rewards with them and new im freindly with them
so i can't attack them for the quests is there somethin i can do to fix this?

Go to the reputation window>Sons of Hodir>mark At War, with that you should be able to attack them

Thanks you so much :)