Who called from 4753290899

I receive 3-4 calls per day from this number, which I have go directly to voicemail.  No message is ever left.  I haven't spoken with the caller.

Called me 4 times on 8/6/14, 7 times on 8/7/14, 3 times on 8/8, and 14 times on 8/11/14. When I pick up, they leave me hanging for a minuteor more.When I called them back, they tell me that it is an automatic dialer and that it is not considered harassment because they are not leaving a message.
Read more at http://www.whycall.me/475-329-0899.html#rPtovd6O5MdiF5QL.99

Non-stop, every day.