Hello,
I hope you’re doing well. I’m sorry for the experience you’ve had so far.
To look into this issue more closely, could you please share temporary Super Admin access (inside the hidden content box)? I’ll check this and update you as soon as possible.
Please make sure to keep a full site backup before sharing the credentials, just to be safe.
Meanwhile, you may clear your Joomla and browser cache deeply to see if it helps!
Kindly check the following documenttion on demo images, this is true for all quickstarts:
https://www.joomshaper.com/documentation/joomla-templates/justice/no-photos-from-demo
Best regards,