Try to keep him on the phone as long ad possible and waste as much of his time as possible. For extra fun, have friends pretend to bring up situations that need your attention (mom is having a heart attack, kid is choking, dog hit by a car) and brush off the situation and pretend to be interested in what the paki is talking about. Jim Florentine is a master of this and you can easily find his recordings on JewTube.