Affordable Auto Exchange

I purchased a vehicle from Affordable Auto Exchange.For a month I have been brining my car back because it will not pass [redacted] I purchased the vehicle on February 8, 2014. When I purchased the vehicle, the car was fine. A day later the Service Engine light came on, so I took back the car to the dealership, and they told me they would fix it because of the fact that the car needed to pass [redacted] and warranty. In the past month, I have brought them my vehicle more than 10 times in this month to resolve the issue. The code that came up is "P0456- EVAP System, Small Leak". What the dealership wants to do is, they want to illegally give me a passing [redacted] sticker so that they don't have to fix the problem properly. I am tired of going back and forth, between the dealership and the auto body that they keep sending me too, and nothing is getting fixed. All I want is for them to fix the problem properly or give me my refund. If you need more information, please don't hesitate to contact me. Desired SettlementI would really like for them to fix the issue properly, or at least get some of my money back, that I have already invested in this vehicle.