Who called from 4047568888

i would like to know who is constantly calling my home in Ny from this number 404 756 8888
when i try to call back this number it say this number has been disconnected

What is this number calling me constantly  , when i called back to ask them to stop it says this number has been disconnected

called at 9:00 pmno name just Atlanta Ga

These idiots called twice today and never say anything when I answer. They just hang up. Anybody know what this is all about?

This company calls me about every 3 weeks reminding me about a pharmaceutical product I purchased 2 years ago trying to resale me.  They tell me they are a secure company but every time I try to speak to a supervisor they hang up.  I have asked to be removed from their list 5 times and still receive phone calls from them.  This has been going on for about 10 months now.