Someone Stole my acc and i stole it back.

So i stopped playing fornite like 6 months ago and yesterday friend told me to try it again. For first i couldn’t sign up, so i thought i just forgot it. I reset the password on my email and launch game and i realise someone has been on my account becasue i he/she completed all challenges, bought skins, different keybinds and today he change my name to get off the acc. I change my password again and tried to change my email too but i can´t do it on my profile. Please help