keep haggling with the dealer, they can always go lower on the interest rate than they admit!!!!
when i got my cupra they made a mistake in the sums of the car. long story but basically they had deducted twice the value of my trade car from the price of the cupra. i noticed, but obviously didnt say anything. the day before i picked up the car i got a phone call "eh sorry theres been a mistake bla bla". i gave them a bit of grief saying i couldnt afford the monthly payments anymore and before i knew it they were back on the phone saying they had managed to reduce my monthly payments, previously they had told me they couldnt go any lower on the interest!
if they want to sell the car bad enough they will try n sort u out, but im guessing if theres only 3 unsold in the country the balls in there court not yours but maybe its worth a shot! my dealers (apart form their poor maths) were very helpful and very keen to
help me get a good deal. plus they offer the gap insurance on finance.