Unable to sign out and update apps on Apple Account

Re: " purchase : When I download an app, it's not like it's related to a previous payment.

And when I look at my payment information, there's no payment. Where should I go?"

Your Apple Account is the account you use to access Apple services like the App Store, Apple Music, iCloud, iMessage, FaceTime, and more. It includes the email address and password you use to sign in as well as the contact, payment, and security details you use across Apple services.

We don't know which device or computer model you are using to make purchases.

You might want to try logging in to your Apple Account online : https://account.apple.com/

If needed:

See how to: Get a verification code and sign in with two-factor authentication - Apple Support

Once there, you can check, add to, edit, or update any of your details.

It may take 24 hours for the details to update everywhere they are in use,

(or restarting your Mac, iPhone, iPad or device may help show the updated info. sooner, if needed)

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Re: Can’t sign out and can’t update apps.

You may want to check whether or not any restrictions are set : Eg for an iPhone:

Manage App Store purchases, settings, and restrictions on iPhone - Apple Support

and

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

or

Mac: If you can't download or update apps on your Mac - Apple Support

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Re: Has anyone had this problem?

We are all Apple users, like yourself, so have no access to Apple's feedback records. Unless someone answers directly here, we have no way of knowing whether anyone else has the exact same issue at the moment.

Useful Resource: App Store User Guide for Mac - Apple Support

See this article for information about updating payment methods on various platforms (iPhone, Mac, etc.): If you need to change or update your Apple Account payment method - Apple Support