Payment Declined

I understand you're experiencing payment failures with your international VISA credit card that was previously working. This can be frustrating, especially when you don't have alternative payment methods available. Here are some common reasons for payment failures and steps to resolve them:

1. Credit card validation issues: Double-check your card details for any typos in the card number, expiration date, or CVV code.

2. International transaction restrictions: Your bank may have recently implemented new restrictions on international transactions. Contact your bank to ensure international transactions are allowed on your card.

3. Card verification status: Navigate to the Payment preferences page in the AWS Billing console to check if your credit card is properly verified.

4. Contact information mismatch: Ensure your billing contact information in AWS matches what your bank has on file.

5. Browser issues: Try clearing your cache and cookies or using a different browser to complete the payment.

6. Processing time: After submitting a payment, it can take up to 24 hours to be reflected in the AWS Billing console.

7. Bank verification requirements: Some banks require additional verification for online transactions, especially for international payments. Your bank might be declining the transaction due to security measures.

If you've checked all these items and are still experiencing issues, I recommend:

1. Contact your bank directly to understand why the transactions are being declined.
2. Create a case in the AWS Support Center under "Account and billing" (which is free of charge) for specific assistance with your payment issue.

Since you mentioned this card worked until a month ago, it's possible there's been a change in your bank's policies or security measures for international transactions.
Sources
Amazon AWS account | AWS re:Post
Managing your payment verifications - AWS Billing
Cannot make a payment with a new Card | AWS re:Post
Paying for products in AWS Marketplace - AWS Marketplace