No matter how famous a master, it is useless for him or her to try to change karma on someone's behalf. If inside you do not identify with the "good" of the Buddha-dharma, no matter how much you appeal for help it will be to no avail.
消業靠哪位和尚大師替你做都沒用，如果你的內心跟佛法的「善」不相應，那怎麼祈求都沒有用的。