Show us the rest of the rejection letter, give us the address of the shop (we need to work out what a reasonable time would be to walk back and forth), and also exactly what you did during the nine minutes. By that I literally mean a minute by minute account because loading has a very specific legal meaning and while you can take as long as is necessary (subject to any maximum time limit), you are not allowed a second more.
Also, is it your vehicle or does it belong to your employer?