Here is the Multi Step Script 2, Please put this to the Javascript section in Unbounce "Before Body End Tag" area

multi_step_script_2.js

<script>
  jQuery('.lp-pom-form form').unbounceMultiStep({
    steps: [
      //if you wanna hide title, simply keep empty of title value, like this {title: '', fields: 3}
      { title: 'Social Details', fields: 3 },
      { title: 'Personal Details', fields: 4 }
    ],
    nextButton: 'Continue »',
    backButton: '« Back',
  });

  jQuery('#progress-bar').show();

  jQuery(window).keydown(function(event) {
    if (event.keyCode === 13) {
      event.preventDefault();
      return false;
    }
  });
</script>