Bella, I am so sorry to hear what has happened to you. I bet you were cursing "Putana di miseria!"
I would tell the police what you know, and get a restraining order. He sounds like a psycho stalker and getting away with this could make him more daring next time.
Do you have any scary friends who could let him know that when a lady says "finito di musica" to walk away with dignity.
I am posting this after Christmas, so I hope that you salvaged what joy you could.