How can I fix the 'purchase could not be completed' error on App Store?

akon16 wrote:

I want to download apps in my iPhone and it’s refusing

If you can’t download or update apps on your iPhone or iPad - Apple Support

Do you have a valid payment method registered with your Apple Account? You may need to have one on file even to download "free" apps. You will not be charged for downloading "free" apps – but many of those are like coin-operated games or vending machines stocked with "in-app purchases", and if you make any of those, you will be charged real money.

Do you have an outstanding balance on your Apple Account? If you owe money, your ability to use the App Store might be suspended until you pay what you owe.

If you are a minor, have your parents or guardians set up parental controls to prevent you from downloading apps, or to prevent you from downloading them without their approval?

Hannabecky742 wrote:

How can I support my account to download

Your question is garbled, but if there is a problem with your account, and you cannot fix it by adding a purchasing method, you will need to contact Apple, same as anybody else.

This is a user-to-user forum and we cannot fix your account for you.

What is the full error message? Did it say to contact iTunes support for purchase problems?

Try reading this, Writing an effective Apple Support Commun… - Apple Community and come back with an explanation of your problem.

I want to download apps in my iPhone and it’s refusing

How can I support my account to download