Hello! My name is*****I am a certified computer professional who will assist you.
Please tell me if you have a smartphone with the Uber app installed?
OK. Which smartphone are you using?
Also, let me know what exactly you see when you start the Uber app?
What seems to be confusing? I would like to know which smartphone you are using and what you see when you start Uber, so that I can guide you where to update the credit card information.