Welcome, I am Cory.
I am sorry this has happened.
Are you signed into the account you no longer want right now?
If you would like to sign in to the other account, just click https://accounts.google.com/Logout?hl=en to sign out of the account.
Once you do that, click on the other account you want to login to and login.
Please let me know if this helped you or if you would like me to connect remotely and fix this for you.