I've had a Facebook account for some time and everything has been fine with it until today. My contacts were sent a video, apparently by me, but I didn't send it. It was done without my knowledge or consent. As my account was compromised, I immediately deactivated my account and re-started it using a different email address and password. Within an hour of me setting up the new account someone added me as a group member for a video group, again without my knowledge or consent. Can someone tell me what could be the problem here and what I should do about it?