Its a total scam. They asked for a "nissenbaum" then confirmed my number and knew my name. Then they went into a pitch for debt relief. Friggin Indian voices. I told em not to call me but they do anyway. cant get off their list. Next time they call I will talk dirty and have some fun with them!
If your number is registered on the federal do not call list, just file a complaint at www.donotcall.gov
You can also register your number there if it isn't already.