good luck!
we had something similar when we bought a fairly new second hand car from the main dealer ('quality assured')
When we test drove it, we thought the exhaust sounded like it might be blowing, but were assured by the salesman that anything like that would be picked up on their 110 point check.
When we went to pick the car up, we were assured that it had passed the check with flying colours, although the paper work was 'still in the service area', so we weren't able to see it at the time, they would post it on.
Naively, we didn't push it, thinking - main dealer, must know what they were doing, and they must have a 'reputation' to keep up.
Anyhow, first journey we went on (which happened to be long distance)- the exhaust fell off.
We went back to the garage saying that we had been assured that it was sound - but were told that 'it must have been sound when it was checked' and devloped the fault after it had left the garage - like they day after (yeah, right).
We pointed out that we had raised with them that there might be an exhaust problem before we purchased it (which they didn't deny), but because they had now found the bit of paper (which they hadn't been able to on the day of purchase) saying that it was sound before we bought it, they denied all liability (and actually, there were other problems too- but the exhaust thing cheesed us off because we had told them about it).
After refusing to leave the show room (for several hours) they eventually agreed to partly meet the cost of a new exhaust (but not of our costs of on the road repairs).
just goes to show it truly is buyer beware!
There 'answer' was basically this kind of thing goes on all the time in the motor trade (to which we said, yes but we aren't motor dealers, it's our first car, we were relying on your 'expertise')
hope you get something sorted out.
have you pointed out that the form is really bad, if it didn't confirm your colour/grade choices in words and not just in code (which is difficult to check, unless you have access to their materials.