Yoou cannot login because your account has been locked.
How can i unlock my account?
iPhone 6, iOS 12
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If you see a message that says "Your account has been disabled in the App Store and iTunes", there is a problem with your payment method on your account, to resolve the problem you need help from Apple support, click -> contact Apple Support for help.
Check also:
If your Apple ID is locked or disabled
If your Apple ID is locked or disabled - Apple Support (CA)
-> Get a verification code and sign in with two-factor authentication
Get a verification code and sign in with two-factor authentication - Apple Support