Email address do not match, need to disable entry

My email confirm, match is not working, entries are still allowed to enter with no match

Kindly follow this guide to enable Email confirmation on the email field. -

Adding-an-Email-Confirmation-Field

Let us know if you need further assistance. 

This works, but does not let the client know what is wrong, and won't let
them enter, just puts on the top of the form.
Joel
AlvinDock Diving
...

Hello,

When you enable the "Confirmation text box" option and if you enter the email address incorrectly, the below error message is shown:

In your form, this is not showing due to the Form Theme that is applied.

What you can do is use an Email validator widget on the form.

This will send a verification code to the user's email address so that they can verify the entered email.

A related guide for reference: How-to-Add-a-Widget-to-Your-Form 

Do review and let us know if it helps.