Bad Service ..dont buy a Nissan

We bought a Nissan that was said to be a demo unit and the paint on the bonnet has started to fade and peel..when we took the car to Nissan to ask what was going they said that its because the car was parked in the sun, this was a sad excuse because the car is nit even parked in the sun and is Nissan quality so bad that sun will damage just the bonnet of the car ..we Took the vehicle to an auto body shop and they concluded that front had been resprayed,,how can a demo car be resprayed .. Nissan doesn’t want to even take accountability they just wanna pass the blame .this so called demo car has been having alot of weird issues,,this treatment is disgusting and shows a very bad and *****ulent culture at this company