Immediately cancel /close/delete your Uber account. As in the linked article, Uber does not allow you to remove a payment method only change it to another card

Immediately cancel /close/delete your Uber account. As in the linked article, Uber does not allow you to remove a payment method only change it to another card or to Paypal. You could also immediately cancel/freeze your credit card until you've resolved the issue with your stolen Uber account.