Cannot access my site or wp-login

Hi all

In the last 10 minutes or so, my site stopped working and I can no longer access the wp-login page. My site is foodiebook.com.au. All browsers ‘cannot find foodiebook.com.au’

I was running the LaunchEffect theme and playing around with some background images. The problem seemed to occur right after I saved a change where I unchecked a box to enable the background image. I don’t know if that caused it, but everything stopped working after that.

Any ideas? I’m not entirely tech savvy but can find my way around. This is stressing me out as I have no idea where to start..

Many thanks
Stephen