Fix Claude AI Subscription Payment -- 2

My Claude AI Max plan renewal keeps failing at the payment-processing step whenever I try to pay by credit card. The card is valid and works elsewhere, yet the transaction is instantly declined before checkout finishes, so the subscription never activates.

I need someone who knows the Stripe-based flow that Anthropic uses (or similar SaaS billing stacks) and can quickly spot what is blocking the authorization—whether it’s a hidden CVV mismatch, 3-D Secure hand-off, regional restriction, or something mis-configured in my account.

Here’s what will count as a successful outcome:
• Identify the exact reason the payment fails.
• Guide me—via Zoom or a concise step-by-step doc—to correct the issue and get the Max plan live in the same session.
• Confirm the charge posts only once and the dashboard shows the active subscription.

Familiarity with credit-card gateway logs, error code interpretation, and liaising with provider support (if needed) will help you move fast. I’m ready to supply any screenshots or temporary screen-share access you require and will be standing by so we can knock this out in one go.