change my preferred payment

I am trying to change my preferred payment as the one you have is an old one. Not active. But when I go to your website it just asks me how I would like to verify you identity. I have had the code sent to both my phone number and email. Then I enter the code that has been sent. Then it just sends me back to the verify your identity question. I have entered many passwords sent to me but it just keeps going on in a circle. I tried to call but spent over 10 minutes just trying to get through the prompts to a real person because your automated system can't help with this. It just sends me back to my billing page where I AM NOT able to change my preference. I am trying to make sure that my payments get to you but clearly I have failed. I have really never had such a hard time giving someone money before. Is there anything that I can do?

Suzanne