How to implement a different header on each page with WordPress Waymore theme?

I am using the waymore theme of popularfx in WordPress and want to change the header image in my About and Service page.

Currently, the same header image is showing on all pages, but I want a different header banner on my About and Service page

I created header-about.php at wp-content/theme/popularfx/header-about.php

and changed code in page.php

<?php
    if(is_page('about'))
    {
       get_header('about');
    }
   else
   {
       get_header();
   }
  wp_head();
?>

but this code is not working at all.

I also tried different plugins for same unique header, wp header images etc