Uber Eats finding ways to double up on charges

I tried to place an order with UberEats, but the App gave me an error saying order could not be processed. As a result I placed the order through my wife's account. I double checked my App and saw that my order had in fact been processed, I tried to cancel but was too late as the restaurant had started processing the food. Since then Uber Eats has assumed no responsibility for the issue and have only apologised that I made the mistake of placing two orders. There is nowhere to complain on there App and Help queries are only met with automated responses until its too late and then the answer is you've queried too late to fix the issue.