Hi

Hello. 

If your Apple ID is locked or disabled

If you or someone else enters your password, security questions, or other account information incorrectly too many times, your Apple ID automatically locks to protect your security and you can't sign in to any Apple services. You can unlock your Apple ID after you verify your identity.

https://support.apple.com/en-us/HT204106

If you're getting an error that your Account is disabled when trying to use the App store, This often happens if there is an issue with your account.

It could be anything, if you had someone use your credit card details and have reported it to your bank or if there is a payment outstanding.

Best to contact iTunes Store Support and see what's going on so you can start using the App Store again.

https://getsupport.apple.com

Apple ID disabled in the App Store: https://support.apple.com/en-us/HT208856