Can I get support here for a VKB product I purchased from another reseller?

No.

VKB North America only supports VKB products purchased at VKBcontrollers.com (as evidenced by the VKB North America sales record, invoice, and order number).

If you’ve purchased a VKB product from a third-party reseller (e.g. Amazon, X-plane.org, Dix30 Simulations, Aliexpress, etc), please realize these resellers operate their own independent businesses and customer support channels. These resellers have distribution/wholesale agreements with VKB HQ in China, and such agreements have nothing to do with the operations of VKB North America (via VKBcontrollers.com).

Therefore, purchases from any third-party reseller are not supported by VKB North America (via VKBcontrollers.com), and any support or warranty requests for VKB products bought from a third-party reseller will have to be submitted to (and fielded by) the same third-party retailer you purchased from and who issued the sales invoice to you.