Pre owned SUV 2019 had repaired on a or down vehicle and was never told

Did you have a CarFax?

If the damage is obvious you would have seen it before you bought the vehicle. I'm assuming this was a demonstrator or possibly a rent a car since it's a 2019 model being sold as used. As opposed to a leftover. Unless you bought the vehicle with some kind of customer satisfaction guarantee, it's yours. Especially when you've had the vehicle several days. It's your word against theirs and who's to say you didn't back into something, have a shopping cart roll into the vehicle, or maybe somebody backed into your vehicle while you were shopping. There's a lot of scenarios they can throw at you. But you can bet they'll swear that the damage happened after you bought the vehicle! If it were me, I'd have the damage repaired and enjoy my new vehicle! Then I'd get back at them by posting bad, but truthful, reviews about the Dealer on social media!! Word of mouth is their best advertisement or their worst enemy! I'm sure a bad review will cost them at least a sale or two!! Hope that helps! Jim