He also calls from 616-466-7318, 616-466-7303, 616-466-7322 and says "Important information for Michael Horton".  I don't know who Micheal Horton is.  When I call these numbers back to ask them to stop calling they say they don't know Micheal Horton.  When I block one of these number then they keep calling with other numbers.  
If someone can report all of the numbers being used then that would be very helpful.