I'd love to hear how typing in the correct tariff code and adding the original invoice to the customs paperwork costs them more money in labour. Filling out customs paperwork correctly isn't "moving mountains", it's the basic order of doing business. If EVGA doesn't want to do this, then they should stop supporting their UK customers full stop.

Also this isn't a "pre Brexit policy" - if you buy anything from EVGA right now here in UK, are you aware that having it repaired/replaced will incur customs duties due to EVGA's incompetence? You won't have this problem buying any product from almost any other manufacturer, so not disclosing this information is dishonest at best and fraudulent at worst.