Sucks to hear this happened to you, but... From what I understand they can't just "hack" your account like someone would do to a facebook account. Run a virus check on your computer. Someone must have been able to get a hold of your keys.
Just a few tips
- Use a VPN
- Don't keep your keys on your computer
- Never give your keys to anybody
That's wise set of info.
Thanks friend and have a happy new year:)