Welcome to the club, lol 
You might try posting in this thread since it’s in the bugs forum:
Something similar happened to me end of July. While it’s annoying, at least I already got all the goodies and achievements associated with the honor stuff - but STILL, it’s the principle of the thing, like you say (losing years of progress for no reason)
Since we’re on the topic of losing progress, my bugged reputations are still (incorrectly) Neutral after prepatch… and those sting in particular since I never got the goodies/mounts associated with Exalted - I figured I’m “done” once I reached exalted so I can just chill and buy said mounts whenever, doh! 
Honestly the prepatch-caused bugs/glitches have been a real buzzkill, I really feel like all the broken/bugged/glitched stuff has noticably reduced my enthusiasm for the expansion