Radiator Hose problems of the 2003 Toyota Camry

We purchased a new 2003 Toyota Camry le. After about 6 months or so we began to hear a water sloshing sound under our dashboard. We thought maybe it was because our driveway was at a slope and maybe the position the car was in, the fluids were rushing through the engine. So we parked in the street. The same noise continued when we braked,turned and stopped. After trying to remedy the problem we took our car to the dealership and they test drove the car and said"OH,that's a normal engine sound" I said I don't think so and went to another dealership who said that it sounds like air in the hoses. They bled the system and it worked for a couple of days and then returned. Back to the dealership 5 more times. Finally they threw up their hands and said for us to give them 60 more days to try to figure out the problem which it was now in arbitration. How can they try to figure out the problem if we still had the car in our posession? we continued to drive this car putting on miles not knowing that when they buy back your car they deduct the miles from the cost of which they pay you on the lemon law buyback. So had they kept the car ,knowing they couldn't remedy the problem,our monies would have been more. They are buying our car back and we feel extremely cheated. We bought a new vehicle. Not a Toyota.