Opinion: The ER overcharged me, so I gave them a taste of their own medicine

I’m through with the days when a giant company can make a mistake, and then I have to call their corporate support center and wait on hold for hours or escalate the call through countless customer service representatives who argue with me and say there’s nothing that can be done over and over again. I refuse to waste any more of my time working with corporations to fix their mistakes ― or at least, I won’t be doing it for free.