AutoNation Ford Katy

I have mixed feelings regarding my recent purchase with this dealer. I came in one Friday to look at a used Mustang Ecoboost that was posted on their site. The unit I looked at was a base model and it was lacking the features I was looking for. There was no pressure at all from Marvin who was helping me out to get it and he even helped me look for a premium trim from their inventory. Unfortunately, the unit he found was from their other branch. I was told that they won't be able to move the unit unless I complete the paperwork. I was assured that the unit was an AutoNation certified unit so I went ahead. After doing the paperwork, I went back the next day to pick up the car. Having given the earlier assurance, I did a cursory look and went home with the car. This was when my disappointment started. I realized that it only came with one fob, instead of 2. It didn't came with the standard flour mats not it came with a manual. It was also missing the engine cover under the hood. When i asked about it, I was told that it was how the car was sold to them. I know I should have done my due diligence when getting a car, but I was expecting these basic things should've been disclosed prior to getting the sale as I don't regularly buy a car.