HTML Form Submission Fix

My simple HTML form looks fine in the browser, yet when I press the submit button the data never reaches the server—no redirects, no emails, nothing in the database. I need you to track down why the form is not submitting data and make it work reliably again.

You’ll start by reviewing the current markup, action / method attributes, JavaScript (if any), and server-side hook-up. Once the root cause is clear, patch the code so the form delivers its payload every time and shows a friendly success message to the user. Please keep the existing layout intact; only functional fixes are required.

Deliverable: a fully functioning form that submits the data as intended, with a brief note outlining the changes you made so I can maintain it later.