UberEats South Africa (payment unprocessed )

I ordered Pizza on the 2nd of October via uber eats. I used cash for the payment and the delivery guy collected the money with a tip but today had an emergency and had to go to the hospital in the morning but the app said I owe payment for the order I already paid for. Tried their help options which actually don't help. This is the 2nd time having an issue I'm forced to pay and no actual help.