My 2 accounts are banned cause they have been hacked.

A guy using this IP 188.116.18.143 in California, has been using my account. Ive been trying to log on after some time off the game and now my 2 accounts are banned. Cause this IP has been using my account.

What can i do?

I live in Denmark, pretty far away from Cali.

Idk how to delete, ive found the email.

If somebody happens to stumble upon this thread: Help! I have been hacked/banned for no reason!