I keep getting calls from area code ( XXXX ) with the following numbers : XXXX & XXXX & XXXX ( 4 times in one hour today from this last number ). I do n't answer, but they continue leaving voicemail messages threatening to send a server to my door if I do n't call back ; threatening to take me to court. I have absolutely no debt. I looked up the first XXXX numbers and there were many reports of this being a scam. How can these people keep calling me when my phone number is registered? I feel like I 'm being harassed now. Thank you for any help you can provide me!