Roccat does nothing wrong here.
If you become a reseller for a product for a country/zone etc. they probably have signed a reseller agreement things like warranty and other stuff are written down and legally binding.
When a store wants to buy a product they enquire at Roccat and Roccat sends them to their designated countries/zone reseller where they can buy their product.
If then there is a problem with your product you have to go to your store and the store...