How can I delete test submissions?

Thirdly, I have sent 2 test emails to check the form but can that be deleted so our program doesn't reflect that?

Perhaps you're referring to test submissions. If you wish to delete them, just head over to your Submissions Page.

However, be mindful that this process can not be undone. Here's a snippet from the guide I'm linking below:

When deleting submissions individually, you will see this warning message (see screenshot below). Please note that deleting submission data is irreversible and will permanently remove it in our servers, including the file uploads on them.

Complete guide: How-to-Delete-Form-Submission-Data