Get Call Blocker App. For your cell phone. Free at Google Play Store, or Get a Call Blocker Device for your home phone. Just block the numbers that are harassing you. They sometimes disguise their number with Call Spoofing, so don't answer call you don't recognize. Let them go to voicemail.
Never Ever Call Them Back.
Never send money.
Never speak to them, they will harass you more.
They will take your money then pass your information to another agency, and the process starts all over again. It never ends.
They will lie, cheat , and break the law, just to make money.
Remember: They have no legal authority to make you pay.