Hello Jiranun,
When signing up for a free trial, we require a valid credit card to ensure that your free trial can upgrade to a paid membership at the conclusion of the 30-days period. Since your card is invalid, your free trial has been suspended.
If you don't update your card information in the next 30 days, you will lose access to your free trial benefits. To continue to enjoy membership benefits, please click here to log in to your Prime account and update your payment information.
Thank you,