Guest account help

So, not sure exactly how it happend but the account ive actually been playing on is just a guest one and when i try to bind it to my Sunborn email/account(same that i use for GFL) it says that its already in use, even tho when i try to log in said sunborn account in PNC its in the first few seconds of the tutorial.

Tldr: how do i bind a guest account when apparently my Sanborn account is already in use(even tho it still in the start of the tutorial)