Here are some tips on what to do if your computer has been hacked:
Unplug your computer from your internet connection. Run an anti-virus
and anti-malwayre software and do a full scan.
While doing this, contact your financial institutions by phone or in
person and prepare to change all your passwords.
Consult with someone knowledgeable about computer security. Let them
check your computer and have it reformatted. But back-up all your
files first. Reinstall all software including your operating system.
Invest in a good firewall protection.
Change all your passwords. Avoid opening e-mail from people you do not know.