Repeatedly calls from this number. No messages left.

Received a couple calls from this number in the past month. Each time I answer there is nothing and then it starts ringing as if I am placing a call. The first time this happened I let it ring a couple times and a girl answered. Every other time I just ignore the calls.

So an Indian guy calls me earlier and asks for me by name and says he's from Microsoft saying my computer downloaded malicious files.  He stuttered a bunch with his story when I was asking why MS would call me.  I asked for a number to call them back he gave me (416) 915-3536 and then I said you sound like a scam bro and he laughed and said "you're right, you figured it out" and hung up.Four hours later (416) 915-7928 calls and asks for me I tell them wrong number.I looked into this 7928 number and now realize they called me the other day.The guy who called me the second time, that I said had wrong number, it was the same guy, I remember his voice now.  He was Indian sounding, but not a thick accent like the guy who called me "from Microsoft" earlier.Anyways The 7928 guy said I was a good Scotia customer and offered me life insurance.  I was polite and said I'm broke so don't even bother.Kept trying to sell me on insurance.  Anyways I guess their second attempt was today with the Microsoft Tech (fake).Where are they getting our names and numbers from?  I heard from many places including resume/job sites.The phone I answered isn't even in my name.

They keep calling me i am with scotiabank but i dont know why their calling me they call all the time never leave a message i call back to tell them to stop calling me and leave a message but they still keep calling me Leave me alone damnit at first i thought it was a creditors but it isnt how many times do u have to call me and i dont answer for you to stop lol

Got in and saw this number had called at 5:20 PM (12 May).  There was a dead air /  hang up msg left. No clue who they are or what they want.

who are these people and what do they want the phone rings twice and no one there