It's not as if he "accidentally forgot" to provide the VAT invoice(s) either - he is actively refusing to provide them. Highly illegal.
Bad dogie.
The same situation with VAT in UK is minereu. They do not provide UK invoice, but maybe you can save some bucks...
Oh my... are they still selling units? Need to add them to the naughty list if that is the case. That is tax fraud if you do that in the UK to save some bucks. BE CAREFUL. Recommend you steer clear of that game.
Do they ship reliably?