I just had a call from the same guy.  As soon as he said something about representing Macintosh and Microsoft computers I hung up on him.  I'm in Toronto.

Have any of you recived call from someone claiming to be from Microsoft and wanting to repaire your computer. I to have been getting calls when i answer i here nothing.  and a few seconds later i here a voice say good by. It might be them calling to see what time is best to catch you at home. Then they call from Microsoft (so they say) and try to sell you Microsoft defender for $130.00 (which is a free download ). It could be related because i have been getting calls from both of them.

My phone number is unlisted,no one speaks&then got a goodbye message

Recd many calls...dead air etc....today an Indian accented man said he was with PC Doc & offering to clean up computer problems.  Said all was ok with my computer.  He said I would not see it as it was not a virus but something that needed to be  done internally.  As he was "transferring" me to the specialist that was going walk me through the process I hung up..  Sneaky suspicion he was going to get me to hand over control of my computer to him.

your prob right!