No refund, no proper feedback, bordering on *****

Worst experience bordering on *****. I tried to cancel an order due to the promo code not working. I clicked cancel 3 seconds after placing the order. The cancellation function did not work and the cancellation was not processed. I called the helpline (which is almost impossibly to find!) To cancel and a robot just said I cannot be transferred to Ubereats. I mailed them and the only response was that the food was delivered so I have to pay. They admit that orders cancelled before the restaurant accepts it will incur no costs. I fall into this category, it wasn't processed as such due to Uber's technical issues. I responded to their feedback and they literally word for word copied the exact same text into their next feedback. I should be refunded but they don't even give me the courtesy of reading my explanation and giving proper feedback. This was my second order from Ubereats and the first was terrible also. I will continue to strongly push for this refund. And I will never again order from them again.