Calls a few times everyday.  Never leaves a message.  Calls at all hours

Just got a call from this number and left no message. Not the first time. B*****ds.

They phoned for the first time last night at 7:30 - hoping someone can tell us who this is and what they want. Did not answer the call as it was IDed as "unavailable"

Answered the call. Got no response to my hello's and heard a click.

I have received many calls from this number, when I am not home, but  they don't leave a message. Today I answered and an guy greeting me as if he was my long lost friend.  His mistake, he mispronounced ,my name, Slam!