Hello @Katiekins79
Unfortunately there’s no way to remove the Wallet App, or any of the pre-installed Apps from your Charge 5, so I’m guessing also the phone App too.
Lots of people would like to be able to remove various unwanted Apps and screens and it might be worth voting for these Feature Suggestions and leaving a comment. Hopefully if enough people vote, things might change.
There may be more if you have a look around Feature Suggestions.
I hope that helps a bit.