I got a call from this number and the guy said his name was Mac and was breathing kind heavy like he was out of breath, said something about Visa and Master Card and when I asked him to Identify himself, they hung up.

Got call from  (416) 642-0882  . I was sleeping.I called back. The phone is out of service.I do not know why he called me.I do get some collection agencies calls though which i do not reply.

They called me, asked for me by name, then said is was my pharmacy. They said they had my refill of Cialis and I just had to confirm it. I laughed at her, seeing as I'm 25 and have no need of boner pills.
You just have to say "Take my number off your list" and they have to comply.

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 ...

Got a call from this number.  Missed the call.  When I tried to callback, it was busy.  After reading all the comments, I'm glad I missed it! Thanks!

Got 4 calls in 2 days from that same (416) 642-0882 number but never answered.How can we stop this?