You get a discount, you get a discount, everybody gets a discount! I'm kidding, that's not how retail stores work. If everyone got a discount for no reason, the store would be out of business. It's the retail worker's job to ensure that people don't show up with expired coupons, and this particular worker who had landed themselves the role of supervisor was very good at their job. OP had actually quit, giving in their two weeks' notice, and we all know that the moment you quit is the moment you…