Disappointing service

I placed an order yesterday from McDonald's chatsworth around 6:15 pm. The Uber app was not accepting my debit card payment. I have a credit on my account as the last McDonald's shallcross order delivered an item less. It refused to accept my debit card order as I wanted to use the credits however it accepted when I chose the cash payment option maybe because my credits would not be used and had to pay in full. My problem Is that my order was cancelled at the last minute which was at 7:15 pm why accept the order if you unable to fulfill it ? Why after an hour reject the order ? Had we known earlier we could have got our food by other means. Uber eats were supposed to be an efficient way to get food but instead this was such an inconvenience and a let down at the last minute. We called the restaurant (McDonald's Chatsworth) they advised me that they cannot cancel an order we must speak to the delievery partner. On your app you have no option to contact you if an order is canceled instead it gives reasons to why an order may be canceled and none of those app**** to me as no one tried to contact me regardingmy order if it needed to be changed or why it had to be canceled. I do not recommend your app as this is not the first time I received inadequate service.