My "Common Sense" remark was clearly aimed at the whole fiasco of what should have been an easy straight forward, defective warranty paint claim.
Not sure if the first dealer was a little lethargic ( let's be kind ) in their approach to resolving your issue, or that MG C/S where dragging their feet, or likely a combination of both TBH.
Clearly the only person NOT in the wrong here, was you !.
The very slow process of sometimes getting warranty work approved by MG CS is not great and a paint claim has to be the worst case scenario, judging by your experience.
Also plain "Common Sense" dictates that customers are not in the habit of spending thousands and thousands of pounds to a car manufacture, for them to supply a brand new car and then have the paint finish just flake of it

.
Why make it SO difficult, the law clearly dictates that they going to have to pay to correct it in the long run regardless !.
Purely for comparison, about five years ago my brother purchased a brand new Audi Q5.
Before it was delivered, he paid the dealer to carry out a full paintwork protection coating.
The car was washed for the first time two weeks later and when it was dried off, there was the outline of white circles on every single panel of the car.
At first he thought they where just white water marks, but even after polish was applied, the marks could not be removed.
He returned to the dealer who agreed there was clearly an issue with the paint finish.
The main agent blamed the coating company for incorrectly applying the product and said they would have them totally rework the car again !.
This rework just made matters worse and car was then booked into their bodyshop the following week.
They had the car for a full week and then the bodyshop manger called to say he wanted to see my brother.
He was totally honest with my brother and said "We have buffed the hell out of that car for the last two days and that is the best we can do, we have spoken to the Audi area rep and he will be here next week.
After his visit, his conclusion was that the car had been sitting in storage somewhere and some type of chemical fall out had burnt into the paint finish.
They offered to repaint the whole car, but my brother rejected the car there and then !.
Complete time line for all of the above work .................... less than 90 days !.