For critical information related to banking or other personal services, always ensure that you are initiating contact. If you get a call from a number, and they ask you this information or questions related to it, do not answer. In case this was a genuine request, you can call back on a verified number to provide those details.
2. Do not panic. Scammers or abusers can dramatize an emergency or put emotional pressure on you to let you lower your defenses and provide information in the confusion. Always keep your presence of mind, and understand that if you are unsure if the caller is genuine or not, you do not need reply or provide any information.
3. Get help from your trusted people. Being a victim of spoofing and related attacks can be emotionally taxing. You don't have to face this alone. Gathering support from loved ones will boost your spirit and give you the strength and wisdom to respond properly to the situation.
4. Educate yourself about the various services and tactics used for spoofing. Having this awareness will provide you with the clues to detect and discern spoofed calls from real ones.
5. Maybe you are getting calls repeatedly from spoofed numbers. Even after blocking the abusers' numbers, you keep getting called from new numbers. Then, it is best to deactivate or stop using your current phone number. Change your number and give it out very carefully to the most trusted people only. Keep the old number SIM card around in case you need it later for your personal use or for help in gathering evidence.
6. Contact the police, lawyers or the court to seek their protection and legal advice. This is especially important in cases where a financial scam or personal abuse has occurred.
7. In extreme cases, providing a formal and legal threat to the abuser can put an end to their abuse. Seek a court order that specifically prevents the abuser from contacting the victim in any manner. Issue this order to the abuser through the lawyers.