Sir, I'm looking for assistance to report an action of cyber crime in Riyadh, Saudi Arabia. Though the person is mis-using the sim card, facebook, mobile phone and whatsapp of my sister and I'm looking for help to stop his act of harm to my family. 
Kindly guide me that how can i report this crime in KSA. I'll be waiting for your able help in this regard. 
Thankyou. 