it's code is LS9R which looking online is white if I am not correct?!
I registered with this site a while ago and have learned a great deal from it, but this is my first post. I believe you may have right to reject the car under the Consumer Rights Act 2015.
There is also a Motor Ombudsman.
The retail ombudsman is Dean Dunham and he has a regular phone-in spot from 9 to 10pm on LBC every Monday. It could be worth a call - you may be able to get more £250 to persuade you to keep the car.