Hacked facebook

Hello,
Can anyone please help me.
Someone is making my life a living hell by accessing my friends and families email and facebook accounts. They then hack the accounts and change the passwords therefore we are unable to recover the stolen accounts.
It has been reported on several occassions, yet we are still getting no joy. The individual concerned it then using the accounts to send abusive and threatening messages and posting things that are putting us in danger.
Someone please help, this is my last resort .