Why is it doing this?

I’ve been sitting here for the past 1 almost 2 hours trying to verify my cousins account so I can link her Nintendo account, so I can redeem my vbucks that I bought today. She got all emails- but this pops up. It won’t allow me to put in any code, when I click continue, it just loads and stays there. I asked my cousin again if she got anything, and still no response. I attempted to switch the account over to my email, but it still needs a code thats linked to hers. I’m getting beyond frustrated and angry considering i can’t get my money back, and the browser is being beyond difficult. I’ve refreshed on my phone and on my laptop, it does the exact same thing. What should I do? I’m this close to selling the card and getting my $8.99 back.