They could have notified the school in Montana.
They did not.
They could have gotten unlost.
They did not.
You are making up all kinds of "what ifs" without knowing, when the FACT is that they were missing for a week.
I'e already demonstrated that if they called the school phone number that they used in Egypt it wouldn't work. I've also demonstrated that if they sought help from Arabic speaking individuals, they could very well end up the way they did without any "ifs" at all.