How difficult could it be to buy a normal, working cell phone? You go to the official carrier shop or their website, buy with or without a contract, and be done with it. This guy failed at every step of the way, which is why his phone doesn't work, and he is out of his money. The funniest part of his tweet is that the phone's battery level went to 103%.
Another problem in this guy's situation is that his phone is probably not suffering from a software bug - his battery probably did overcharge and went over the recommended voltage, meaning it could have actually exploded. Most phone batteries stay around 3.7V to 4.2V, and going over that limit could have all sorts of dangerous consequences.