Authorised repair but told manager to call with a ...

Authorised repair but told manager to call with a price first before beginning. When call was made the price was more than the car was worth.So I declined the work. Manager informed me that the tires and battery were already installed on car before the quote phonecall was made. I told them to remove the tires and battery and I would pay for diagnostic service. Nope he said battery's are non returnable and I had to pay for it. This is not fair busness practice.the mechanic could of used a battery pack to diagnose the car to let me know that it would be $5920.00 on a car that was worth $1000.00. I am calling corporate to report the Warwick Rhode Island location store and tell then of the incompetence that was shown to me in this situation.