I'm furious about this and would really appreciate some kind of response from Apple as to why they allow this to happen.
So, contact Apple support directly. These forum are not an official channel to Apple.
Aside from losing sales, I'm also being given 1 star reviews because the app "doesn't work" apparently. Can I get these reviews removed?
If I remember well, when you submit a new build for release, you can ask to remove existing reviews.
>waiting 43 hours for the IAP in my latest app to start working. It's still not
Did you try the trick of minor editing the product item description(s), then saving, to see if that moves things along?