My E-mail and password has been changed!

Repeating a post that is the same as your previously one is pretty much pointless. As for your problem, you will need to speak with Support on your account and they would probably not do anything, they are the only people that can help you at the moment. It is fairly unlikely that someone would want to hack an account at that low level as in my opinion is a waste of time.

You should not of been sharing/trading accounts with other users because this is what happens when you trust random people saying this and that (Free ZP, Free VIP, Free Everything!) and this is what you get for falling for it. At the moment there is nothing you can do as you cannot log on to your account to submit a support ticket and if your email has changed, you cannot send a verification email with all your log in details.

Next time, be more careful with people you trust in Crossfire because otherwise this will happen again.