UberEats - missing order and no way to contact them to resolve!

The poor driver was good, let me just say that, but the order I placed was a buy one, get one free from Burger King. Only 1 half of the order arrived. Apparently the order did not go through correctly on the app. These things happen, but you cannot for love or money get hold of a person at Ubereats. The "help" button was not much help, the bot sends you to the next screen, and then to a "sorry for the inconvenience" screen. That is no help at all, and nothing is resolved. No phone number, no agent to talk to, not even an email address. And the driver has no contact with them other than a bot either!!

Surely you guys are big enough to be able to offer decent after sales service to customers, and at the very least, a help line to call!