False Advertising of a vehicle

On an internet search for a low milage demo vehicle, I found a vehicle I really wanted that suits my needs and my pocket. I called the dealership which confirmed the vehicle is available and it is on the floor Trailblazer 2014 model 2.8 LTZ 4x4 Auto . Hence I made arrangements to immediatly come for a test drive and do an application. All went well and I liked the vehicle so much I immediatly after the test drive confirmed my intrest and did the application. First thing the next morning I have sent my full application and supporting documents to the sales representative. No feedback came until I phoned them to inquire, needless to say the ehicle has been sold to another dealership and then they tried to sell another vehiicle to me. I believe this to be a tactic of false advertising to pull in customers and then sell another vehicle to them which is similar but where they can make more money. I am verry frustrated in the way they deal with customers and the fact that this happene to me twice now at a Williams Hunt dealership make me think this is a deliberate act . With this I hope to warn other would be customers of their dirty tactics.