My App Store was accidentally offloaded. And suggestions on what to do?!

First reset the Screen Time password.

Screen Time passcode reset

If successful.

Do a backup and try a factory reset. Then restore from your backup.

Restore to Factory setting.      

Backup - Restore your device from an iCloud or iTunes backup.      

See 'Your account has been disabled in the App Store andiTunes' https://support.apple.com/en-us/HT208856. This link says: "There might be a problem with the payment method that you have on file. When you see the message, don't try to edit any of your account information. Instead, contact Apple Support for help.”

Try using the Apple recommended support link above first. But, this site is down very often. Use the support options I give below if necessary.

You can use Apple Support Twitter https://twitter.com/AppleSupport

And, if necessary, go here to contact iTunes worldwide support via text or chat https://support.apple.com/choose-country-region/itunes After choosing your country, see the heading, Tell us how we can help.