they keep calling but will never leave a message

We get calls from this number daily.  When I answer, no one is there.  When my voicemail picks up, they say "hello" over and over.  I tried calling the number, but you can't call them, they can only call you.  Very, very annoying.  My husband and I both work from home and these nuisance calls are really disruptive.

This person called and I did not pick up because I had read previous posts about this number being a scam ,  they never leave a message

Thanks to all that post here so that we know we need to block this number.

Called today; no message left.

obvious call center in background, Female saying she was a Certified Microsoft Engineer and there was a problem with my computer. I told her that her system was reporting correctly, and my machine was designed to crash her system. That ended to call very quickly.
Normally I answer out of area calls "Microsoft Tech support" as 90% are MS scams.