Hello,
The support article If a message says 'Your account has been disabled in the App Store and iTunes' - Apple Support says you must contact Apple for help if you see that message or one saying "You cannot login because your account has been locked".
This is not something you can fix yourself. Click or tap on this link provided by Apple to be put directly in touch with the people who can help you with this issue ➞ https://getsupport.apple.com/?caller=kbase&PGF=PGF63005&category_id=SC0245&symptom_id=23362
or for telephone contacts refer to: Contact Apple for support and service - Apple Support
Others may suggest you use the general support link at Contact - Official Apple Support , but starting at the general support pages will likely end up at the same place I provided above. Using the direct link I provide will save you the trouble and time.