All your previous settings and the marketplace purchases etc are associated with the account that you used originally.
Sign out of whatever account you have been signed in with now and use the original instead.
I’m not at PC right now, but the sign in/out location is at the top right of the main menu.
You can also check your accounts by logging into Xbox website
https://account.xbox.com//en-us/Social
I would recommend opening a ticket with Zendesk support.