"Purchase could not be completed" Error message on iPhone

Hello~ Contact Apple…also please consider that all participants here may not be “bros”. Click on below and review…

Subscriptions and Billing - Official Apple Support

Go to lower left and click on Support.

~Katana-San~

What did Apple say when you contacted them and asked?

This is a user forum. You are not talking to Apple.

Did the message say anything about contacting iTunes support for help with purchase issues?