CALLS EVERYDAY... leaves no message. I called back requesting to be removed

Today, something about reducing interest on a credit card.  Just hung up to not waste any more of my time.  BTW I do not own a credit card.  Obviously a scam.  

8.12.2009

My parents have received numerous calls from this number and no on eis on the other end.  I call the number back (# on caller id) and it rings busy.  I added my parents number on the "do not call" directory but I believe these people are working from an old list.  Its very irritating.  I am sure the telephone company should be able to do something about this issue.

Have received numerous calls from this number.  Last week my wife told them
to stop calling us as we were not interested.  We then received two phone
calls at 4:20 and 4:20 a.m. on Saturday, March 21st with them replaying my
wife telling them not to call us.  This number needs to be investigated and
shut down by the Canadian Government.

It's a scam.  Shows (613) 216-2172 "Ontario" on caller ID.  They are tryomng to get your credit card information.  File an online complaint with the FTC here:http://esupport.fcc.gov/complaints.htm

They woke me up with a call to my cell phone.  When i called back the number was no longer in service--about 3 minutes later.