For Amazon error code 8005, this is usually an error related to the payment method.

Here are some possible solutions:

1. Check payment information: Make sure the information of your payment method (such as credit card, debit card) is correct and has not expired or been frozen. Update or change the payment method if necessary.

2. Clear browser cache: Sometimes, temporary data in the browser cache may cause payment problems. Try clearing the browser cache and then try to make a payment again.

3. Change browser or device: Sometimes, a specific browser or device may not be compatible with Amazon's payment system. Try to use another browser or device to make a payment.

4. Contact Amazon customer service: If none of the above methods solve the problem, it is recommended that you contact Amazon's customer service department. They will be able to provide more specific help and support and solve the problem you are experiencing.

Please note that the error code and specific solution may vary depending on personal circumstances and Amazon's policy changes. It is recommended that you operate according to the actual situation and Amazon's guidance.

I hope this information is helpful to you!