Honestly, even if their customer service is good, that sort of thing is unacceptable. Price aside, you expect the product to be what you ordered, without flaws. Yes it happens, but to allow a product to ship with all those issues is simply unacceptable and will surely paint a negative picture about the company (in time). They can fix the issues all they want, but at the end of the day first impressions count. Not trying to sound negative because I have a pair of DM's being made as well, but if they came to me like that I would never order from them again.
Even if Meermin fixes the issue by sending a replacement pair, you would never order from them again? With a standard like that, sounds like you won't be ordering any shoes from AE, Alden, Meermin or C&J anytime soon.