If you entered the wrong email address when creating your account, simply log out of the account and create a new account with the correct email address.
The steps to follow are:
1) in the Orbit app, press the 3 horizontal line in the top left corner. This will bring up the app settings. Then press the 'Log out' button at the bottom.
2) Now, that you are logged out, you will need to press the back button to get to the initial screen where you have the option to "sign in" or "create an account'
Please select "create an account", you can now setup a new account with the correct email