Well, the CS folks can’t make changes to the game to grant you the progress. If it is bugged sometimes they don’t even know about it - hence check the forums and if it IS bugged, put in a Bug Report so they can investigate and patch it.
However, there IS a Forum Support Agent comment on that over in Customer Support. It won’t resolve anything, but at least you can see the current status of the discussion.
https://us.forums.blizzard.com/en/wow/t/vicious-saddle-bug/829300