16 : Fixed, Confirmed Order. your order is now fixed and can no longer be changed with regards factory spec.
20 : Built, Fairly self explanatory.
30 : Shipment, At dock waiting to get on a boat.
35 : Transit, On the water bobbing along to the UK
40 : Arrived, At the docks in good old Blighty
45 : Ready, Car is waiting for collection by transport company.
50 : With Delivery Instruction, Delivery instruction has been sent to transport company.
55 : Goods Out, Car is on a transporter on its way to your dealer
60 : Arrival at Dealership
I would be very surprised if they have your car in 12 days I'm afraid.
Unless he couldn't be arsed to find out what status it is, and just said 16 because you cna't change the car order then and it gives him more cover for length of time to get the car in.
As I'd have expected it to be past 16 by now. From when you first posted being at status 13.