Earlier quoted context omitted.
Yep. It's a blatantly obvious dark pattern. It's your credit card. Your money. Yet Apple gives you no way to cancel (or even view!) a child's subscription online. Heck, they won't even tell you which child made the subscription.
One of my younger kids bought $7,200 worth of currency and content on a game on a Kindle. She did so in a single afternoon. I contacted Amazon support and the refund was issued on the spot. After they issued the refund, the only question that was asked was why I had it set to allow her to buy online. I replied that it was because she could not use one of Amazon's services with the family account without having paymen…
There's no good reason I shouldn't be able to cancel an auto-recurring subscription on my own credit card from some interface.