I have been getting these calls as well.  I am also on the National Do Not Call List and I have an unlisted number.  We are in Newfoundland and I have had this number call my house on a number of different occasions.  Won't leave a message.  I just refuse to answer this now.  They called at 10:00am on a Saturday morning.

Some guy with an east indian accent called to inform me that he wanted to lower my interest rate. I asked where he was calling from. Arizona, he said.  I informed him that I was on the no-call list. he hung up.

Yes a company claiming my credit card company wants to lower my rate.... lol right..  No mention of name.  I wish I could find out who does this and show up at thier door.  Really why are the police not all over this  come on coppers  do something rather than pulling over people for no reason.

I did a reverse number lookup and of course the company is unknown. However it is a Telus number and I am going to contact them and complain that this customer is harrassing me.  Hope it works.

I have told them off they said they wanted my name and where I live they don't know where I live and they cant't do anything about it if you tell them off or tell them to go f*** right off they don't have the authority to call the police if they call you and you swear at them

Dave,Don't waste your money on a cell phone if you think it'll stop these calls.  I get just as many of these stupid calls on my cell as I do on my land line.  I have a feeling that many of these companies just blind-dial all the numbers (i.e. 0000-9999) in any given prefix they know is associated with a given city, regardless of if it's related to a land line or cell.