Hello Emma. If your Minecoin balance reads as zero after redeeming a gift card, it is most likely due to a processing delay, or a possible mismatch between the redeemed account and the account used in the game. While it may show that the code was applied successfully to your child’s Microsoft account, the coins will not show as being available to spent in Minecraft unless that same account was signed in to play the game. Additionally, it can take as long as 24–48 hours for Minecoins to reflect after they have been redeemed.
The first step is to confirm that the code was redeemed to the right Microsoft account by checking with Microsoft’s redemption page, check the order history, and confirm in the Minecraft app that the same account is signed in. You can try restarting the device, and re-sign into Minecraft, as this can help synchronize the balance.
If after 48 hours this is not resolved, please reach out to Minecraft Support for further assistance.
Please let me know if you have further questions or this helps.
Best regards,