Double charges

On the 16th of July, I ordered food and the app gave me the estimated time for delivery. However, the driver came earlier than the mentioned time and I missed his first call but I answered his second call. I collected the food and gave him the money (R87), but the collected drink was missing from what I ordered. When I was enjoying my food I received an automated call from uber eats saying the driver has been waiting for a very long time for me to collect my food, and that was not true. The driver **** about that because I was already eating even though the drink was missing. I went to the app to complain about the missing drink and I was so surprised to see that they say I owe R87. I sent a message asking about the charges. UberEats refuse to remove the charges. They say I didn't collect my food and I made the driver wait for 8 minutes. This is a lie and I have been using uber eats for a very long time, I never made any driver wait. That is why I am inclined to believe that the driver did not complete my order after I have collected the food and he **** about the wait. I find it to be disturbing that UberEats want me to pay twice for one meal. They refuse to remove the charges on my account.