Why would you come on here, start this thread and not have a picture to show everyone? I mean that said, I can't believe the service center said they wouldn't repair a noticeable dent. I would've absolutely raised hell... or at least distributed the picture online and tried to escalate. You did the right thing, and I don't blame your wife for wanting to switch brands. I've owned two teslas now and was getting tired of not having a VIN for my Y and almost went and bought a bmw.
I took a picture, however It was impossible for you to see given it was black and I am using an iPhone(Maybe my angle was bad). I was more concentrated on trying to see if I could get it resolved and calm an upset wife down.