If you paid for this case with a credit card, and the damage is not due to abuse, you might try disputing the charge with your credit card issuer, on the basis of faulty merchandise.
For this, you will need evidence that you made a good-faith effort to resolve the dispute with the merchant. In...
"Known problem since 2008"? Or just with 2008 models? There's wording in that service advisory that makes it clear that the DIY kit is not applicable to Retina models.