After a recent experience at WLS, I have decided to share the unfortunate aftermath with the world.
As WHM doesn't seem to want to let me take a full-page screenshot, I've saved the HTML output and uploaded to my own domain here: https://cwatson.org/wls
Please note that this ticket has not been edited in any way, shape or form - the HTML has only been modified to strip out external sources, in-line CSS and images and remove WLS' GA code.
I hope that "naming and shaming" this will serve as a hint to WLS that their style of support is unacceptable.