Sorry to hear PiVoRuS - at least now you know to be more careful with your account and have a strong alpha-numeric password.
You can warn others from your mistake who may be doing account trading and placing too much benevolence/trust in someone by giving them a heads-up on the risks.
Sad to read it, but we have warned for months about using a secure password and never share it with anyone.
However, many players still trading accounts with other people or giving his password to whatever. This is always a player risk.
Its impossible to know who is telling the truth, or who tries to recover fraudulently an account traded with another player. Therefore, we can not intervene. Every day some account is traded/shared and too munch times stolen. How to knows the full history?.