I am restricted from the App Store and I don’t know why

Do you meant that your Apple ID is disabled in the App Store? If so, it is usually a billing-related issue. This is primarily a user-to-user support forum; other Apple users like you. You will need to contact Apple Support. The following Apple Support article includes a link that you can use to contact Apple Support: If a message says 'Your account has been disabled in the App Store and iTunes' - Apple Support

Hello ~ Go ahead an contact support as this is Apple’s way to let you know that there may be an issue with your account.

If you see a message that says 'Your account has been disabled in the App Store and iTunes'

Contact through link or by going to lower left and click on Support or:

Contact Apple for support and service

~Katana-San~