Need to get I tunes and App Store account back on my phone

This is primarily a user-to-user support forum; other Apple users like you. You will need to contact Apple Support. See instructions in: If you see a message that says 'Your account has been disabled in the App Store and iTunes' - Apple Support

If you mean that the App Store app is missing, be aware that the App Store app is not one of the apps that can be deleted but it can be removed from the home screen. Go to the App Library (swipe left past your last home screen). From there you can touch and hold an app and slide it left back to the home screen.

Another reason for it not being visible is due to a restriction on purchasing. Go to Settings and tap Screen Time, tap Content & Privacy Restrictions, tap iTunes & App Store Purchases, choose a setting and set to Allow. See: https://support.apple.com/en-us/HT201304#prevent-purchases