The information in this article can help you when you're unable to redeem a download code and you receive the error code 2813-0055.
A download code can only be redeemed on a Nintendo eShop set to the same region as the download code. (For example, a code sold for use in Australia can only be redeemed with a Nintendo Account also set to Australia.)
If you are attempting to use a download code from a different region (a European download code with an Australian Nintendo Account, for example), the download code will not work.
If you are attempting to use a download code from the same region as your Nintendo Account, this may be due to the game not yet being released. If this is the case, wait until the official release time and then try again.