My card is being used for unknown AWS account

Hello.

If the AWS account charged to your credit card does not belong to you, you will need to file a dispute with your credit card company as described in the document below.
https://repost.aws/knowledge-center/charges-from-unknown-account

Someone is using your payment method without your permission. If you're the individual owner of the payment method and don't have an AWS account, then someone might be using your payment information without permission. Speak with your credit card issuer to dispute the charges.