Amazon is walking back staffers' raises after a bug miscalculated compensation
businessinsider.com
businessinsider.com
But I really doubt that this was malicious. Of course it is easier AND morally satisfying to be angry at the mega-corp.
If that's the case, it seems like it would be prudent for Amazon to just give what was originally quoted, unless it was way way off.
It wouldn't be malicious to force the company to honor their representation either.