Can’t purchase or download any thing
Not able to download or purchase anything
Why not? Details please, such as exact wording of error messages.
One guess:
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
You can also use the general support link at Contact - Official Apple Support provided in a previous reply, 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.