Transmission Gear Slipping problems of the 2003 Audi A4

In mid-February, I purchased a 2003 Audi A4 from overland park Jeep in overland park, kansas. The car was a one owner, very low mileage (28,000)vehicle at an attractive price. As a one income family with a newborn, this car had the safety and looks we desired. On the day of pickup, the car's top malfunctioned, and it was sent to molle Audi in kc, mo for repair. While there, I asked molle to run an inspection on the car to determine if I should keep it. They touted that they sold the car, and had serviced it. Mentioning they were the only Audi dealer repair experts in the area, they gave it a clean bill of health. I picked it up after five days, and op Jeep paid for the roof repair. I paid for the inspection. On the 34th day of ownership, the transmission slipped. I thought maybe the car was cold. A couple days later, it did it again. I contacted molle, and took the car in for service again. Now, they claim the car needs a new transmission and that it will cost over $7300. 00. Op Jeep states that since it is past thirty days, they "don't know what I expect them to do about it". Molle says it is just tough luck. It was perfect a couple hundred miles ago? the original warranty on the car was 4 years/50,000 miles. Since the car is 10 months past the time frame (although 22,000 under the mileage), they won't do anything for me, I just need to pay the $7,300. 00. . . . Which I cannot do? Audi USA has yet to respond, but claimed they follow the advice of the service manager, which didn't indicate they would do anything but fix it for $7,300. 00. I need this car for work, it needs to be safe for my family, and our newborn son. It seems incredibly unfair that I have owned a one owner, very low mileage carefully maintained car for just over one month, and just over 200 miles, and be faced with a $7,300. Bill on a vehicle that cost $17,000. Op Jeep made claims to the quality and inspection of the car that were not true.