According to our Terms and Conditions, remember that Uber is not responsible for the value and the conditions of the Errand. The Errand, in terms of collection, payment and delivery, must be agreed directly between you and the driver.
Keep in mind that the amount of the trip can be covered through the Uber app with the payment method of your choice. However, the Errand or extra favor must be paid directly to the driver and only in cash.
Please choose the linked article below that is most related to the payment issue you had while using for Errand:
I paid in cash for a trip I requested as a digital payment
I had a problem with a cash payment
I paid more because my driver didn’t have change