@Woofles
Do you know how you were h4c|<7d? First you need to make sure your machine is secure, so you don't get h4c|<7d again. Run your anti-virus and change the password on your email.
As for recovering your accounts: When the email address changes on your IMVU account, IMVU sends your original email address an email that contains a change-back link. Open the email and click the link to change your email address back to what it was. The email might have ended up in your junk folder. If you did not receive one ... the h4c|<7r might be in your email account as well. Change the password on your email.