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1.
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.
2.
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
3.
If your payment method is declined in the App Store or iTunes Store, see ->
If your payment method is declined in the App Store or iTunes Store - Apple Support
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How to complete your purchase if a payment failed or was declined
- On your iPhone or iPad, open the Settings app.
- Tap your name.
- Tap Payment & Shipping.
- Add a different payment method and remove the old one.
- Try to complete your purchase.
If you still can't make a purchase
If you have followed all the steps and instructions and if you still need help, get more help and assistant from Apple directly, see Contact Apple for support and service -> Contact Apple for support and service – Apple Support (UK)