if this happens again take off the back panel and then unscrew the plastic piece holding the battery while holding the r button so it doesn’t come apart if it does just put it back together but there should be a small rectangle with a rectangular button on it right below the r button if it is bent back try and push it so that the wight rectangle lines up with the green plate and it should work but if it is detached or 1-4 of the metal things holding it together are detached send it to Nintendo and they will fix it for free