Faulse adverti*****t

I was sold this Opel yesterday by this dealer. The add on their site said the car is in good condition. We test drove the car down one road, came home tried to drive the car again and now the gears won't work. Called the sales person Lesley who now says the car is old and had no matenance doesn't sound willing to assist and the manager as well. I requested they do something because the ad or they did not mention any problems besides the ones we picked when we were there.