Hacked in my account

Hello, my Facebook account was hacked into yesterday on profile it said pffft 5000 mates. And all the sunned I realised someone come fb account and add friend that I don't and I did know and after that I changed my password and if some try's to get in my fb I get send a massage and the thing is that I still get accepting from people how I don't even know of so I block them. I feel like some wanted steal my inanity.