Well I have also bought from this seller.
I have had a problem and it was fixed by the seller.
He didn't even hesitate to fix it.
@DaKiddd should check his email as the game was added on his own personal account. You MUST have an email from Battle net with the purchase. If something went from you also would recive an email.
The seller is by any means not scammer. He was very helpfull and understanding.
Also seen enough purchases in his Discord server. And only positive reviews.