Oh dear. What a misfortune this is.
Have you tried changing your password for said account? That usually solves most hacking ordeals for hacking can sometimes involve a mere user(s) you may have shared your account information with in the past accessing your account again without your consent. If you change your password here on the forums, chances are they will no longer have the needed information to hack you. Methinks there's just no need to immediately want to rid yourself of your account(s) when steps can be taken to prevent these "hackers" from accessing your account again.
My, how tragic!
As Vespian said, have you recently changed your account's password?
Did you use a password that's: Used for other websites, easy to guess and remember, and/or commonly used?
If you did not use a password that met the requirements above, I suggest you change your password still to something even harder to guess yet easy for you to remember.
Do not share your account with a family member and/or friend.
But if you do, keep in mind that you're responsible for your account.
Also, has any information about the account, you, or anything else leaked into some sort of website?
This may be problem, if ya' have. Leaked info may be too much and give off clues to what your password is, sometimes.