Hi Palaniappan,
Thank you for posting, I am here to help you today. Are you getting any error message when you tried to update your Debit information from your Microsoft Account?.
To fix this try this steps:
Try to use a private browsing.
Clear cookies / cache data on your browsers.
for more details you can check this article:
looking forward to helping you out. If you need more help please let me know. If the answer is helpful, please click "Accept Answer".
Best regards,
Jansher