When purchasing AI Gateway credits, clicking the purchase button or submitting the checkout modal can trigger multiple separate transactions if clicked more than once within a few seconds.

Please consider adding client-side debouncing or idempotency checks on the checkout button to disable subsequent clicks while a payment is actively processing, preventing accidental duplicate charges.

By the way, support agent was helpful, I explained my problem and I´m getting refund in about 5 to 10 days.