There will be no problem proving the new shop partner was not part of the original agreement. His name would not be on the old licensee issued for the shop to do business. If the new shop absorbed the old shop it is there Reasonability to notify you of it moving your property and honor the original deal. I believe up to 10% overage. Next thing I would be hunting down pictures, videos and receipts of parts you had installed on your car. This way you will be prepared when you go look at your car in case something else is damaged or missing.