We are not releasing your information. In january of this year, you began the process of joining Wikitree, but you never completed it. This leaves you hanging as a guest.
If you wish to close this account, then I would suggest you write to -- info at wikitree dot com -- and also send them the link to your profile and explain that you wish to close your guest account.
If you would like to continue with the membership procedure then you may do so and once you become a full member, your profile will go unlisted.
You will have to provide the same email address that was used for the original guest registration.
There is also a possibility that this person is not you but you just happen to have the same name.