It's absolutely insane and terrifying that you can never get into contact with anyone at a company in an emergency.

This pretty big company has 99% chance of being compromised, and their data is just sitting out there, but nobody at this company responds. Engineers, security staff, CTO... zero response.

They even have a security.txt (as in it doesn't 404), but it's empty.

This is why companies get ransomed. Because if they don't see it, it isn't real.