These scammers have been hitting me with a phone call per day for the past 3-4 months. They always use a different phone number, and only twice did they leave

These scammers have been hitting me with a phone call per day for the past 3-4 months. They always use a different phone number, and only twice did they leave voicemail (one was a recording, one was a bunch of guys chatting as if they forgot to turn on the robot). The recording says something like "the IRS is suing you." For the numbers that weren't blocked, I tried checking them using Twilio's Lookup service: https://www.twilio.com/lookup https://www.twilio.com/lookup While the numbers are often in my local area code, the Twilio API shows the "Mobile {Network,Country} Code" is typically in South America or Eastern Europe. How did they get my phone number? I replied to a Craigslist ad a while back that turned out to be a scam :( I wish there was a way to get rid of the calls ...