I had a problem once but it turned out to be the restaurant's fault (they accepted my pick-up order, marked it as picked up and closed for the day before I got my food - all of this in the span of ~10 mins). I submitted a complaint via the app and Uber refunded me no questions asked. </shrug>
I read </shrug> as a self closing tag <shrug /> as human language is not necessarily valid XML. It is amazing how we "autocorrect" things as we read that we have to consciously stop and think what we did.
Yes we got our money back, but what a pain.