You can actually recover it. Sent Riot an Email saying your account has been hacked. They'll ask for the user name, email, login ID etc. Give them an email that you didn't give to Former Captain, and they'll email you back asking for you to give them your IP address so they can identify that it was actually your account. Give them your IP, they'll verify it's your account, then send you a email allowing you to reset the PW on your account. ezpz
Someone hacked my account a little over a year ago, and Riot got it all sorted out really quickly.