@iroast If you are feeling very trusting and all other hope is lost, I have an electrical engineer buddy that might be able to analyze the circuitry and see what went wrong. (I can't guarantee that it wouldn't catch fire during the "analysis," my friend has done that in the past [to albeit sketchy, dollar store quality power banks].) In his words, "White smoke good. Blue smoke bad."
Similar to what @Maypo52 said, finding out what went wrong is better than simply accepting that something "broke."
If you really do want to live dangerously, I can DM you my address- I would happily pay for shipping and perhaps a new power bank-- it is always difficult when an everyday item breaks or wears out.
But first, see what support says to your request. They're nice people.