I purchased 2 x ASUS 4070 DUAL Graphics card at Amazon Germany, this promotion was advertised on the site. after some back and forward with tech support, I tried to redeem it with the registration form. And I got this reply from https://account.asus.com "The product wasn't be purchased in the specific dealers"
It was sold by Amazon themselves.
I sent emails to firstname.lastname@example.org but got no reply, I contacted Asus Germany, promotion email, but I only got told that they were not sure who should I contact to solve this issue