Hello!
We have proven skills with Joomla and we can fix the problem.
Our skills: CMS Joomla, Wordpress,Drupal, HTML, CSS, Javascript, Jquery, Bootstrap, Php, MySQL, Adobe Photoshop, Illustrator, etc.
You can see our profile: https://www.freelancer.com/u/Webln .
Please, send a link to the crashed website. We'd like to discuss the issue in detail.
With regards,
WebIn team.