Go to your account, it will show the win there, as well as the redemption code.
I apparently won last night, but I too didn't see the window, but mine was the situation where I submitted my entry, but the result page never showed up, it just kept loading. The weird thing is, is that the win doesn't show up on my account, but when I play it says I have won twice. And the email I got doesn't contain a code, instead it says that I will receive the code once they verify my eligibility.
Has anyone tried to activate the card as soon as they redeemed it? I redeemed one a few hours ago, and each time I try to activate it, it says there was an error.