Someone called named "Alert". Odd name. I don't know anyone named Alert. Maybe they meant "Albert.." ! Must be a wrong number since no respectable company would ever call someone on the DO NOT CALL list. ..!!
They used "Alert" to scare you into thinking the call was something important instead of the scummy sales call that it is. You are right, no legitimate company calls people on the DNC, criminals that are trying to steal your money do.