Your payment method can be changed at any time from the Uber One page in the Uber or Uber Eats by navigating to Uber One under “Account.” Click “Manage membership” to make changes to your payment method.
Any Uber Cash can be used towards this recurring membership subscription. To do so, click Uber One on the Account page of the Uber or Uber Eats app, then “manage membership.” On that page, you can update payment details to have your Uber Cash turned on.