Audi s3 weelee

I app**** for a audi s3 advertised as for sale with finance. Just to be told 2 days later that the car needed repairs for them.to be able to sell it.they suggested getting a quote .I agreed to wait and see the costs. 30 min later I was told they sold it to someone else.. how do u advertised a car to be sold.then changes the story with repairs. Then sell it to someone else