I can't make any purchases

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You must contact Apple for help when you see a message saying "Your account has been disabled in the App Store and iTunes" or "You cannot login because your account has been locked". This is not something you can fix yourself. Apple provides a contact link for this specific issue. Tap or click here --> https://getsupport.apple.com/?caller=kbase&PGF=PGF63005&category_id=SC0245&symptom_id=23362

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Based on the support article: If a message says 'Your account has been disabled in the App Store and iTunes' - Apple Support

If you can't make purchases or update apps, including free apps, you may need to have a valid payment method on file, even if the app you want to download is free.

See -> Add a payment method to your Apple ID -> Add a payment method to your Apple ID – Apple Support (UK)

• If you want to change your card, add first the new card, then remove the old one.
• or if you use your Apple ID balance, set your Apple ID balance as your default payment.

If you have set your Apple Account balance as your default payment method, your default payment method will be used first by Apple when you need to make a payment.

Some purchases might require you to have a credit card on file, even if you use your Apple Account balance to make the purchase.

See also the following Apple articles:

Payment methods you can use with your Apple ID

Payment methods you can use with your Apple ID – Apple Support (UK)

fyi: Not all credit & debit cards seem to work with App Store / iTunes Store, try a different one, or preferably a credit card. If your card is not accepted as a paymenf method, you need to contact your bank.

If a message says 'billing problem with previous purchase' or 'verification required'

If your payment method has expired, declined or failed, or a message says "There is a Billing Problem with a Previous Purchase"

Add money to your Apple Account balance

Add money to your Apple Account balance - Apple Support

Click here for more support and assistance.