I can’t Update my iPhone?

Did you see this message: 'Your account has been disabled in the App Store and iTunes' https://support.apple.com/en-us/HT208856. This link says: "There might be a problem with the payment method that you have on file. When you see the message, don't try to edit any of your account information. Instead, contact Apple Support for help.”

Use the Apple recommended support link above first.

And, if necessary, go here is how to contact iTunes worldwide support via text or chat using this link https://support.apple.com/choose-country-region/itunes After choosing your country, see the heading Tell us how we can help.

See my reply.

No you can't. You need to enable your account first

If you see a message that says 'Your account has been disabled in the App Store and iTunes' - Apple Support

Ok, you need to get rid of the error messages before you can update.

I explained above what to do