This really is a good example of why you should never collect your car in the evening. I do realise this bloke probably didn't but you know what I mean. If it was me I'd refuse to accept the car back in that condition, call the local cops, demand to see the garage manager and service manager and call the head office while standing in the garage in front of them. As soon as the car is out the gate they'll deny all responsibility.
It’s a shame so many garages act like this. If you speak to more senior staff they’ll agree that word of mouth is vital to their business and are well aware of the forums on the web. Many sales staff browse forums and are members of some. When I got my Z the sales man who didn’t even own one chatted to me about various forums including this one.
The owner of the Jag must have been in tears when he saw it.