I have done the 2 second search, and the all day search as well.
If I was trying to hide the ways to contact a human being with a precise question that needs a specific answer Air B&B would be the model I would use. It completely useless.
The USA phone number is just that, a phone number to somewhere on the other side of the world. I live in the middle of the bush in East Africa and we have no landlines. all calls are on pay as you go cell phones or true satillite phones. The cost of a 30 minute call is about equal to my daily room rate, so I don't want to ring the buggers if I can avoid it. Don't give me the they call back rubbish, because in my experience they don't.
My one attempt at calling the USA number ended in a hour of mostly holding, several conversations with people where I repeated my request each time, and finally being cut off as my credit ran out. Its a 45 minuyes drive to buy anymore phone credit where I live. I was never rung back and still have no answer some 6 months on.
There isn't an email contact that deals with specific issues, in my opinion that is insane if the object of the exercise ts to help hosts. if someone takes an interst in your bleats about problems chucked out on these community pages maybe you get an answer. It's anything but helpful and advise is often conflicting. There is no certainty you will be contacted, and any tricky questions are ignored or glossed over.
I have had two specific problems that I never get an answer to, nobody rings about them and so they linger on and on. God forbid I ever need to contact somebody in a hurry.
The help system is not fit for purpose, its frustrating, detrimental to the brand and completely hit or miss.