[Billing] Claude Code Max 20x: OSS Program promo applied to wrong SKU, $200 overcharge (ticket 215473995216928)

Summary

I was accepted into the Claude for Open Source Program in March 2026 with a promise of "Claude Max 20x free for 6 months." On April 20, 2026 I was charged $200 because the promotion was applied to the wrong product (Pro instead of Max 20x). After a week of silence on both the email and in-app Fin chat channels, I am opening this issue as a public escalation path.

The SKU mismatch (receipt evidence)

The April 20 receipt shows:

• Line item: Max plan - 20x · Qty 1 · $200.00
• Promo line: 6 Months of Pro (100% off) · $0.00
• Total paid: $200.00

I was not enrolled in Pro, so the "6 Months of Pro (100% off)" line offsets nothing on my Max 20x bill. The system applied the promotion to a plan I never signed up for.

Reference numbers

• Ticket ID: 215473995216928
• Invoice number: 36B0DF3D-0011
• Receipt number: 2926-1432-5114
• Date charged: April 20, 2026
• Billing period: Apr 20 to May 20, 2026
• Account email: yzhao010@usc.edu
• OSS acceptance email: from anthropic-team@mail.anthropic.com, subject "You're in: Claude for Open Source Program"

What I have tried

• April 20: opened Fin in-app chat, ticket 215473995216928 assigned. Fin offered only "cancel subscription as part of refund," which would forfeit the OSS Program benefit. Refused.
• April 22: emailed support@anthropic.com (cc sales@anthropic.com) with the SKU mismatch evidence. Five days, no response.
• April 27: returned to Fin chat with multiple messages including an explicit "I do not accept this determination. Please escalate this to a human billing support representative." No response.
• April 27: sent a follow-up email in the same thread. Opened this issue as a public escalation since both first-party channels are silent.

The correct resolution

1. Replace the misapplied 6 Months of Pro (100% off) promotion with the Max 20x, 100% off for 6 months promotion that the OSS acceptance email promised.
2. Refund the $200 charged on April 20, 2026.
3. Keep the Max subscription active so the 6-month OSS benefit runs its full term from the original activation date.

I would prefer this be handled through normal billing support, not via cancellation-and-refund, because cancellation defeats the OSS Program benefit.

Public X post for context

https://x.com/i/web/status/2048938466168476152