Who called from 4072686575

I got a call from this number. They said they were from "Credit Card Services" and wanted to give me a lower interest rate. I hung up on them.

A rude person called saying they were credit services  - when we hung up they called back with a threatening message saying they would let a charge card amount go thru

I have received call from this number and when I tell them I am not interested, they tell me they have all of my information and then when I hang up ,they call back numerous times.  I have blocked their number.