Hi Asma,
Thanks for reaching out to Microsoft Q&A Forum. I understand that you're facing error message "0x80048823". Please wait for 24-48 hours and try login again. Meanwhile, try this to help me categorize your issue:
Try login with other account to your Microsoft Store. You can try to create a new account to login.
Can you still login normally your current account into Microsoft links or other apps such as Office or Outlook?
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Best regards.