Well I got the money today for the invoice my detailer gave them, they refused to pay him directly so just sent me the money.
After speaking to the sales director once the invoice was sent, I got the impression this has happened a few times with their network recently. Probably why it was all dealt with so quickly as they're not surprised and getting a bit miffed with it.
It's hardly surprising though, when I was waiting for my car last week, I just saw the valeters walking around the showroom just using the same rag on every car, including one that was waiting to be picked up. Half the time not even using any kind of product, just dry dirty towel on the paintwork. It's no wonder that new cars have such horrendous paint condition when they're collected, even with just delivery miles. But fortunately for the dealership, 99% of customers see a shiny car and assume it's mint