Sure, but the free plan doesn't require the use of API credits. Why would it bill me for that when I hit the "upgrade" button. And, of course, there's no way

Sure, but the free plan doesn't require the use of API credits. Why would it bill me for that when I hit the "upgrade" button. And, of course, there's no way to check what Anthropic thinks I bought, the support page offers no insight as to how to figure this out and the support@anthropic.com email alias is unstaffed.