CCP has not been hacked.
Your ticket is more than likely in a queue for investigation, as it’s been compromised due to a lack of two factor authentication, a shared password with an email compromised email account, or a combination of all three.
In this instance, it sounds like your email account was compromised, which gave them your username, and access to 2FA via email code, as well as permission to reset your account password.
Generally, when an account is compromised like this by a hacker, it’s for one reason - to empty your assets out and suck the skills from your character to use in RMT activities.
This is super messy to investigate, because typically all your stuff will have been sold on the market, skillpoints would have been extracted from characters and sold, and you’d be in a position where you’re now interconnected to hundreds of other innocent players who’ve bought your stuff on the market unawares of the fact your account was hacked.
All of this needs to be cleaned up, and your account needs to be restored to its former state. This is the reason that it’s been suspended while an investigation is ongoing.
Check your email accounts, change your passwords, and ensure that they’re secure.
All you can do then is wait for the customer support team to get back to you once they’ve rectified the issue.
Please don’t rumor monger on the forums, it’s against the rules.