ha...I totally can relate....My mom has the internet and it will ring and ring and ring...I get so pissed off because, what if there was an emergancy? I told her before what if I needed a kidney and she couldn't answer the phone....I have told my mom she needs to get a little blinker light contraption to let her know....

regardless, same old same old....

Your situation though....be very nice and not hostile and let your dad know that you would love to have a relationship with his GF but every time you call there is no answer.....That you can only do so much and you feel that she is not trying.....

that will show him you are trying and that he needs to talk to her....