Premium account stolen

[gattibn94]

Today i noticed that the mail associated with my account was not the one thtat i subscribed with (mine is lucario94@hotmail.com and in my profile it appears to be kazzazmoney@gmail.com) and since i always login with facebook i didn't notice till today. Also i noticed that on my desktop appliaction of spotify it was being reproduced a song on mohammed's Iphone, device that i do not own or know (plus it had a playlist that i didnt put there in the first place).

I would really appreciate you guys helping me with this problem.

(Attached .png file with the desktop app and the unknown device)