UBER EATS DELIVERY SYSTEM IS A MESS

I ordered food on Uber eats first from Spur and when their service provider couldn't deliver I placed another order from Curry Buddy Steakhouse which they also couldn't deliver. The problem here is that I paid for all these orders a total sum of over just R500. I re**** of UBER eats network and their business model to deliver. I entered all the necessary information including gate access codes and unit number. When Uber fails to deliver I just remain with costs and no product and I have to way to escalate the issue, which I think shouldn't be allowed in a customer focused business like theirs. The only for of communication I had with the drivers was through in app texts, which they answered selectively and I have also found out that these delivery guys have listed incorrect numbers on these apps. Uber has a duty to ensure that we can get in touch with these people incase there confusion and I can't be expected to bear the costs where the driver claims to have contacted me and hasn't. I received in app calls that just said that the driver is trying to call me and when I try to return their calls they wouldn't answer. I DEMAND A FULL REFUND FOR ALL THE MONIES DEDUCTED AND I WILL NEVER USE UBER EATS AGAIN