call me, f*ck you

Among all the phone calls I made today, I had two in which the customers, at the time they gave me their numbers, claimed to be extremely eager to hear back from me.  Please imagine my annoyance when these two very important phone calls were not only unanswered, but denied voice mail.  There was this cute little message "this very important person is unavailable.  please try your call again later."  I mean, I live to serve.  I probably have nothing better to do than to call these people until they decide to pick up.