Need help with unsubscribing from a site please

[Simplicityfails]

Hi, so my nephew got fooled earlier. He actually believed sites like this (https://www.poets.org/poetsorg/antholog ... codes-free) would get him a legion beta key... He went through followed up with this site thats called abcmouse.com for kids and learning an etc. He signed up with the credit card, first 7 days free and then $8 a month after. Problem is he didn't even sign up, there was no create account with password and username. I go through the steps to cancel account even though there wasn't one and it just takes me to a page that tries to force you to upgrade and if you decline then it bills you now and adds 12 months to your account, i can't afford this and UGH hes driving me crazy right now, can't believe he did this. Is there anyway to get this cancelled? Supposedly it's a legit site, I see posts all over multiple different sites of people actually using it but I can't find a way to get this off my card. There isn't even a contact number or email for this site.

[Simplicityfails]

It's a scam site appearently, I'm just calling tomorrow and having the card cancelled and having em send a new one. That should take care of it.