Originally showed up to purchases a car that was a...

Originally showed up to purchases a car that was already sold but got mislead to believe it was still there. After I arrived they offered me a different vehicle after negotiating we reached a deal. This is my first lexus so I wasn't familiar with the different options. They figured out my lack of knowledge and repeatedly lied to me about the vehicle options. I purchased the car in cash took it to a dealer near me to only figure out the vehicle isn't nav ready nor could I just get a navi upgrade. Notifed them about my findings and they continued to just be fake.