cell phone caller

This number called my cell phone today and left a message.  It sounded like a real person reading a script that said they were "authorized by your credit card companies" to reduce my interest payments to 1.9%.  Don't have any debt, see no reason to reduce my interest, and am on the DNC list.  Didn't leave a company name or call back number.  Obviously scammers.  

someone called. did not leave a message and I dont call back.

I reluctantly picked up after 2 rings. Said "hello"....no response and the caller hung up.

They called , didn't leave a message , I have gotten so many call not only this number but several others ,  one said need my info . I told them not they don't , I don't get my supplies from them so they have no reason for my info , she said but I need for , I said no you don't an I hung up . How crazy do these people think we are .