Hello @aman1980,
Welcome to our community help forum and thank you for your post!
I see you're looking to update your card in your new account. A card can only be linked to one PayPal account at a time. For help with accessing your old PayPal account, your best option would be to reach out to us over the phone or message us option. I recommend you to click the 'Contact Us' link at the bottom of the page. From here, if you click the 'Password and Account Access' option, then 'Login Problems'. you will see "Call Us" option at the bottom of the page during working hours. Please give us a call so that our team will help you to access your account. Once you get access to your old account, you can remove your card and add it to your new account.
Best wishes,
Bindu
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