I'd have to say Abena, although its not so much about their customer service. Their customer service, when I asked after their retailers, was quick to answer, but it's hard to find info on their website, and it is partly untranslated from Danish. Not a problem, as I can understand written Danish, but it is very unprofessional to have untranslated pieces of information and menus, and does not give a good image, even though their products have been quite all right. They also offer no free samples, at least not here, which makes choosing the right one difficult, and some of their retailers only sell to large customers, like hospitals and care-homes. I guess that's partly Abena's profile and strategy.
However, they ought to make their communications somewhat better.

Should I apply for a job there?