Claude AI Refuses Refund After System Error Bills Credit Card for Max Plan

I am filing a formal complaint regarding unauthorized subscription upgrades and unjustified overcharges on my Claude Anthropic account. Despite explicitly selecting the standard monthly "Pro" tier during checkout, the billing system automatically and without my consent upgraded my subscription first to an annual plan, and subsequently to a "Max" tier. This systemic error resulted in unauthorized deductions exceeding 5,000 TRY from my credit card.

Upon noticing these unapproved charges, I immediately contacted Anthropic customer support. Instead of rectifying the billing error and refunding the difference, the support team merely canceled my subscription entirely and explicitly refused to issue any refund for the overcharged amount. Consequently, I have been billed for premium tiers I never authorized while being denied both the service and the return of my funds.

Processing unauthorized plan upgrades and refusing to refund the resulting overcharges constitutes a deceptive billing practice and a failure to honor explicit consumer consent.

I demand that Anthropic immediately issue a full refund for the overcharged amount exceeding the standard Pro tier rate and properly adjust my account to the originally requested subscription level. Please be advised that I am simultaneously initiating a formal chargeback process through my credit card issuer to recover these unapproved transactions.