I had a similar issue and posted on here a couple of weeks ago about it. Basically I cancelled the car a week before it was due to arrive as tbe APs were much higher when I ordered. Cancelled the car and ordered a new one (different make, but one I had preferred but it wasn’t on programme when I ordered) on the same day. All fine! Yes, going to back of queue but for the sake of saving £1000 and getting the car a call actually want, I’m ok to wait for another few months! Good luck!