This is a fireable offence for the CEO. There is no excuse for this level of incompetence. Makes me question all sorts of things now about Zoho. What else is run like a shit show over there?
I think that warrants CEO visibility.
If I am the CEO of a local supermarket or a butchery, I don't need to know my domain registrar as they are not a major factor to my business. My website being down for 1 week also might not make a big difference. My customers deal with my company face to face.
But if I am a CEO of an "Internet company" and my customers deal with me via my "domain", I damn well ensure that I have a weekly quick call with the guy who could block my domain abruptly.
The line, "they should be fired" is so easily spoken by people who have never been in charge of something very big and involving many moving parts.
The fact is, anything of sufficient significance has innumerable potential failures waiting to happen. Even with the best, methodical effort, it is impossible to predict and protect against them all.
People who want to be angry at executives can direct their focus to the MANY huge companies that are actively evil and actively antagonistic toward their customers. Zoho should be way down on the list of targets.
Sorry, OP was a bit too hard on you, but I think you have quite a bit of egg on your face for this one.