New car dealer moved goalposts on finance

gasbag1602

Hi hope you can help here is my problem
I ordered a car from Nissan and agreed on a a good deal when I was happg I signed the order form.
At this point the dealer advised that if I took there pcp I would recieve a £1000 nissan finance contribution and proceeded to give me a quote to which I was happy with and accepted.
I was given a pre contract quotation detailing all payments and interest rates as well as terms and conditions.
One of these terms says that the dealer is bound by this quotation from 24th may till 24th June.
I recieved an email saying the car will arrive on 16th june a couple of days later.
Then 3 days ago I recieved another email from the salesman saying he had made a mistake and apologies but he could not give me the £1000 finance contribution as he had used an employee scheme to discount my car. And my payments would now go up to XYZ.
I am not happy with the increase but still want my car on the original terms detailed on thd pre contract agreement.
Can I insist on him honnoring the previous terms?

This has caused great distress. I am not an employee of nissan and neither did I imply I was so this is his fault and he has held his hands up via an email.

Thanks in advance Alan