If you signed in for the first time using Google, Facebook or Apple, you may have inadvertently created a new account instead of linking your old account.
Make sure you can still sign in to your old account -- sign out of the new account and use or old username and password to sign in.
Try signing in to the new account in a desktop browser using the same method you used to create it, or sign in using your new username and password. Make sure you are signed in to the account you want to delete, and then use this link:
https://www.ebay.com/help/account/changing-account-settings/closing-account?id=4199
Do not delete the account you want to keep by mistake.
