UberEats shocking service

I got a delivery from KFC. Once inside my residence I checked and saw that 2 of the 4 items I ordered was missing. I immediately got in contact with the driver and asked him if there wasn't perhaps a package still in his car as I didn't receive all of the items I ordered. He said no and he doesn't know what to do because he isn't allowed to check the order. I tried logging a support query on the app. It was a frustrating process as somehow they have now refunded me but only for one item and not both. I paid for two items I did not receive and was only refunded for one. This is unacceptable. What annoys me most is that a refund in 3 - 10 working days is not going to feed my hungry child now. This is shocking service and I will never use Uber eats again and I used them regularly