rep;ace one brake line when all needed too sold me a lemon

I am a little late with this review, but I have to get this out so no one else gets screwed over like I did. Back in July I bought a Grand Marquis from them and about 1 week later I notice that there was something wrong with the brakes. I took the car into the dealership and had the service dept take a look at my car. They replaced one brake line and said everything was good. Fast forward about 2 weeks later and my brakes give out on me while I am driving so I take it into another shop and they said the other brake lines were rusted out so bad they at car should have never been sold like that in the first place. What gets me though is how can they replace one brake line and not even tell me the other 3 were rusted out. This has showed me they don't care about the customers and only care about the all mighty dollar. Hershey motors risked me getting in an accident by not telling me about my brake lines. Which I don't understand because had they told me the other 3 needed to be replaced too. I would have had them all replaced. After all that's common sense, but Hershey motors don't have that. They just want the quick sell.