It sounds like you were in the Middle East... my guess is that you got flagged by their denied party screening, which would also explain why nobody's telling you what happened. (Not trying to excuse Uber or "the system" here.)
What vendor does this, is it possible to correct one's profile? Also, is there any general redress mechanism?
The whole thing is strange since Uber and Grubhub dont have any real identification on you except phone/email/creditcard name -- is that even enough to do denied party screening and blacklist someone?
Also, anyone know the rationale to conduct denied party screening on food orders?
Can you fill in what that means? Why is the Middle East relevant and what is 'denied party screening'?