Hi sastation,
Thanks for posting your question. I'm more than happy to assist you. If it is just the template files that were customized you can manually install the template to your WordPress website. You'll need to use FTP or cPanel's File Manager to do so. Once all the files are uploaded, you'll simply activate the theme in the WordPress dashboard.
Manually Installing a WordPress Theme
Using an FTP program, upload the template folder (all the theme/ template files should be in one folder) to the /wp-content/themes folder in the root of your WordPress installation
Now, log into your WordPress Admin Dashboard
Go to Appearance ->> Themes
You should see the theme you just uploaded via FTP. Click "Activate" under the theme
Now, your WordPress website should display your new customized theme. If you need further assistance please feel free to contact us.
Thanks!
Tim S
Manually Installing a WordPress Theme