You can change your username over at: User > Settings > Update Username.

You can request an email change over at: User > Settings > Request Email Change
After requesting the change, follow up steps will be mailed which need to be followed to complete the email change.

Please contact support to request the deletion of your account, Keep in mind that this action can't be undone once finalized.

Head over to the login page and then click on the "Forgot Password?" link, Then follow the steps on the next page to reset your password.

Please contact support to see if we can help you recover it.
You can already search through your mailbox and see if you can find any emails from "FreeHourBoost" to help find your account.