You are unable to make a purchase on the Nintendo eShop, and you receive the error code 2813-9804.
This error code indicates a temporary service outage impacting the use of credit cards on Nintendo eShop.
What to Do:
As this error is due to a service maintenance or outage, wait a while and then try again.
The most up-to-date service maintenance and outage information can be found at https://www.nintendo.co.jp/netinfo/en_AU/index.html.