How do I fix my son's wallet?

Hi and thanks for reaching Microsoft Xbox gamer's community. My name is Josef.
I'm an Independent Advisor and a Microsoft Xbox user like you.

Hope you're doing great today Laura

So, your son's wallet already have money, right?
Could you try disabling temporarily this permission and manually you use his account to purchase the desired content to see how it goes?

Sign in to your Family page with an adult account

https://account.microsoft.com/family/home

Find the child's name and select More options > Spending.
Under the Ask to buy section, switch Needs organizer approval to buy things to Off.

Share your feedback if necessary, greetings from another Microsoft user!

Hi there,

If this is happening on a Xbox console be sure to check if that console is set to the correct country region in the settings. If it is set to a different then be sure to change it to the correct country region

Something else to check is for your son's account is to check the balance on the account via this link:

https://account.microsoft.com/billing/payments to verify if the money is showing there in the account balance

If the money is not to be found then it might be best to contact Xbox Support (via phone) they should be able to look into issue.

When I try from Windows 10 Xbox store it just says to go on Xbox.com and do it and on Xbox.com it uses the funds from my USD xbox wallet when the money is in my CAD xbox wallet so how do I change it?

Just checked, it is out. How much to be fixed, worth sending it in to be fixed on my wallet or just smash it and go buy new one after some overtime?

I have figured it out and was able to remove myself and can purchase a realm. One more question I have a 10$ giftcard in my wallet but I cant use it. How do I fix this? Thank you for your help as well.