I got a call - they hanged up very quickly.

Received the call but didn't answer. There was no VM. Must not have been important and/or legit.

I received a call from this number today, when I answered no one spoke. I called back and no answer????

I received a phone call from this number with someone identifying himself in a low voice and speaking quickly - "??? Associates" saying something about my owing $48.  I think it is in error - because I pay my bills on time and don't owe any "Associates" anything.