These folks are really REALLY persistent in their calling habits.
I started getting calls two days ago, 7 February 2016. I received 6 calls from this number within a 20 minute period. The 1st call only had the number listed on my display. The last 5 had "Farrem" listed as the caller name. I then placed the number in my "Call Block" option.
Yesterday, I got 4 calls in a row. One ring and my phone did whatever it does to the caller. The name listed was "shala" on all the calls.
So far today, I've had 3 calls in a row. The name listed was "ibrahimm". Only the first caller listed a name that was capitalized. I have not answered any of the calls.
So, 6 calls, then 4, and today 3. Maybe they are learning!