CarMax LAX

My wife and I purchased a car from this store on 07/30/2014. Next day, we have noticed that some problems with a vehicle. Our biggest concern was back up sensor was not operating. A BACK UP SENSOR very important option for my wife and we specifically purchased a vehicle that has this option and paid what they were asking without the HAGGLE. We took our car to the service center on 08/01/2014 told them that BACK UP SENSOR is not working. 11days later, when we went back to pick up the car, the service agent told us that this car does NOT have BACK UP SENSOR. What about the sticker that says it does? what about the online ad that says it does? what about the sales man who confirmed that it does? and NO HAGGLE PRICE that we paid for? Sales man and the Sales manager had a quick meeting, try to sell us another car for $3000 more. We refused and they told us to JUST RETURN THE CAR AND WALK. We spent hours to finish this purchase, purchased an insurance for the car, ran the credit checks, gave up on other 2 cars that we were interested in from other dealers.... They told us to return the car and walk? What a simple solution!! NO HAGGLE PRICE BUT HAGGLE OPTION (BUT IF YOU FIND OUT, THEY WILL TELL YOU TO RETURN AND WALK) PLEASE be aware of this when you are about to go purchase a NO HAGGLE PRICE BUT HAGGLE OPTION store called CARMAX.