How can I update my apple store

Hey there,

This app updated when you update the phone you can't update it manually!

If you mean you want to update the app on your iPhone See this article ☞ How to manually update apps on your Apple device - Apple Support

Update App Store? Do you mean update Apps in the App Store?

If you can't make purchases or update apps, including free apps, you need to update your payment method or add a new one. If you already verified that a payment method is available in your country or region and you're still having trouble, learn more.

You can't choose None as a payment method...

1. If you have an unpaid balance or payment due
2. If you have a subscription that automatically renews
3. If you're using the iTunes Store or App Store for the first time
4. If you are not in the country or region you’re creating an Apple ID for
5. If you changed your country or region
6. If you're a part of Family Sharing