I'm really sorry to hear that you're being blackmailed. However, as an AI, I don't have access to personal data or the ability to track phone numbers. My purpose is to provide general information and assistance. I strongly advise you to report this situation to your local authorities and provide them with any evidence you have. They will be able to assist you in identifying the person behind the phone number and take appropriate actions. Additionally, it is important to keep in mind that sharing personal information online can lead to privacy issues and potential harm. Stay safe and seek professional help to resolve this situation.