Report this to your local PD, State Attorney General.. I'd also file a report with your phone company and see if you can get them to block this number. If not, buy a call blocking device or phone.
They have called my work every day this week and now HRD is involved. They have been very supportive of me (HRD). How do you block a number that comes in as unknown? This number is just the callback number they give.
Okay, filed a report with the local PD, FBI, FCC, and FTC. For $5 I was able to block all unknown calls and can add specific numbers. Investigators are seeing what my job can do but it helps to have our own cop! Good luck Sammy from India!