Major website issues; no images and contact form not working

Hello, a few days ago I contacted WPMU support as our contact submissions were not working (they were showing in backend but not pushing to email). The person helping me said they would continue to try to fix it. Not only is it still not working, but now the images are not loading on our website. The tech support person made the situation far worse and its impacting our business.

After installing updates I see:

An error occurred while updating WP Media folder: Download failed. Forbidden

Downloading update from https://www.joomunited.com/index.php?option=com_juupdater&task=download.download&extension=wp-media-folder&version=4.7.12&token=255b3a18-515d-4fab-97f9-8c639eb569fd&siteurl=http://yellowbrickroadindustries.net…