AutoNation Dodge Ram Arapahoe

I recently purchased a used vehicle from Autonation Dodge Arapahoe and had a bad experience. Through the entire purchase process I was told that my used car came with a 4 month/3,000 mile warranty. After we did the paperwork to complete the purchase I was told that they had made a mistake and that there was no warranty with my car because it was 11 years old. This is after being told 3 or 4 times that it came with a warranty. The window sticker said it came with a warranty. What BS.