Maximum props for Velosport, well done. What comes to contacting Amer and especially the brand store, this is for sure not the right place as the products are sold through a network of "importer" (T-H) and the retailers..
I've had some issues with Crossmax adapters and what comes to Tunturi-Hellberg, the support was pretty close to a disaster even though Bikeplanet (for this issue) was doing their best.

There's for sure many opinions about the products themselves and it's a known fact that the customer service at M is not the best in the planet but I'm really wondering what's the role/responsibility of the so called importer if they refuse to handle this kind of stuff? Well, it's great that VS has stepped up for this, this is how you create long term customer relationships..