I really feel for you. I think the best thing would be to get away from your parents. Your father is behaving in an abusive way that is very damaging for you. Your mother is letting you down by not protecting you from what your father does. She should be standing up for you, and I am so sorry that you have to be in this situation.
Can you stay in a backpackers? Or is there a friend who can help you with accommodation? Can you stay with your auntie or sister?
You must try to escape. I don't know what the police are like in Rome, but you could report your father for what he's doing. However I would only do that if you had somewhere else to stay. Remember you have done nothing wrong and this is not your fault. What your father is doing is horribly wrong. I really think that people should have to pass some kind of test or get a license to be allowed to have children! The sad truth is that some parents are not fit to be parents!
Please don't ever consider hurting yourself, why should you be punished for something that is not your fault? Get away from them any way you can, so that you can heal yourself and be strong, surrounding yourself with only people who are kind and good, and have a beautiful happy life like you deserve.
Good luck to you and much love.