In my own experience, UberEats support team is stellar - I have had many many many issues due to couriers or the restaurant (wrong order, order got delivered completely ruined, order was cold, order was missing something, ...) and never once was I left in a bad situation.
I have almost always had a full refund (otherwise just partial for what was wrong/damaged) but what I really LOVED was how transparent they are throughout the process.
They message you when your concerns resulted in a ticket opening, when someone picks up your support ticket, when they are working on a resolution, and then when they found a resolution for your issue.
It's very seamless as well - I was experiencing issues on their web platform, DM'd support on Twitter, received info by email and on the UberEat app and at not time was there inconsistencies.
If it wasn't for the quality of their support team - I would have stopped using UberEats a long time ago.