Who called from 2139433150

I have gotten phone calls from this number everyday for the past 3  weeks; it is really annoying and irritating.

Who the bleep is this?  Called number back and no answer (of course) then a recording that says "all agents busy" and then it conveniently gets all garbled.  On do Not call list.  You robocallers can take a long walk off a short bridge ina rolling donut.

Just got this phone # from AT&T and keep on getting at least two missed calls a day from this number but cannot call back and tell them to stop calling as mail box is always full.  Grrrrr.  I put in a DO NOT CALL REGISTRY but it doesn't seem to help Grrrr again.

keep getting calls but there is none there?

Dumb [***] piece of [***] they have a dialer running wasting $ everyday and stressing people out like me.