I called over the phone about their 0% apr offer, ...

I called over the phone about their 0% apr offer, I ve been told that the car I m looking at was valid for the offer and the only requirements needed to get approved are a credit score of 720 or better and 20% down payment of the car value and that I would definitely get approved to get the car I want. I gave them permission to run a credit check in order to get me approved and go over to purchase the car. The next day I received a call from them saying that my application got declined because I m a first time customer, why wouldn t tell me that when I first asked about the requirements and before running a credit check and affecting my credit score.