Who called from 7708847808

This number had called and when I answered no one said anything...

They called asking for me by my name, I asked who's calling and from where.
They said the name again but muffled as I could not understand what they said.

I asked who is that? The hung up as soon as I asked that.

Must be a Scam.

I tried to call back and the call could not be connected at this time.

I don't know who this is. When I call back it says it can't connect at this time. Others have received the same call
from this number

This number calls our small business about once a week. They always ask for the owner, then the owners wife, then the manager. When I ask who is calling, or what about, they say they will just call back another time. They wont give you any information about themselves, which alone is untrustworthy.