Ugg Boots available in all sizes

Someone has taken my good name and sullied it. I was contacted today by the ebay police. A computer mastermind has hacked my account and is selling Ugg boots at discount prices using my credentials. I don't understand how this is possible. How can someone log into my account without knowing my password? Did they figure it out using some advanced scientific algorithm? I only know one machine capable of cracking such a hard code. God, please let me be wrong. Please let there be another.