For starters, make sure you contact us through a new ticket on the website: Create a Ticket
Within the ticket, please make sure you describe EVERYTHING that's known to you. We have our automated systems to help us detect recent logins, IPs, countries and accurate login timestamps. We will do our best to compare these details with the information you provide us with.
Please make sure you elaborate in the English language, as we're an English-speaking server with an English-speaking staff team. Be sure you include all the changes you made to your account in terms of emails and character names (if any).
We will do our best to resolve your issue within 24 hours, but for that we will need your full collaboration.
TO AVOID FUTURE HACKING ATTEMPTS: please visit the "Account Settings" page and hit the "Security and Privacy" tab: "Security & Privacy"
Add security questions, add Google 2-Step-Verification, and secure yourself to dramatically decrease the chances of this ever happening again! Be sure to change your passwords every now and then, and never use the same password for more than 1 thing!