Got the call 5 minutes ago and he said he was calling form the credit card company claiming my interest raes were going down...I then asked which credit card and he said the one in my wallet...this guy must have thought I was stupid...I basically told him off and hanged up the phone.

Weird.
I got a call from this number last night around 8:47pm.  I missed the call.

just looked on some other sites and this seems to be an issue with alot of people, however the rcmp and the opp have apparantly set up a joint task force to deal with this after several complaints about the same thing, which they call phonebusters 1-+1 888-495-8501

i've got a call today, didn't pick up, listen to the voice mail - nothing...

i've heard a theory though - a wireless service provider makes the calls and charges you when you pick up (not sure but i think they charge as it was a minute or so), if you don't pick up your voice mail stores a message, even if there is nothing but silence, so when there are more then whatever messages in your plan - they charge you also, and it's not so hard i get like 7 empty messages a week (my limit is 3). and that might be cacked by the fact that the provider has no idea who/when/where called you. i might be wrong since i buy pay-as-you-go cards, and don't have any statements, but check yours...
i also get calls from unknown, all 5-s or 0-s... pretty much every week, i wonder if those guys will get tired eventually ...

They said they were "I-Talk" a chinese phone company...I asked to speak to the manager and was told that I would be called back!
And the number...busy or not in service...

This is the number that shows up if I dial out from my Vonage phone using caller ID block (*67). Appears to be out of service if you call the number back.