take revenge on, be revenged on, exact/wreak revenge on, get one's revenge on, avenge oneself on, take vengeance on, get even with, settle a/the score with, pay back, pay out, retaliate on/against, take reprisals against, exact retribution on, let someone see how it feels, give someone their just deserts, give someone a dose/taste of their own medicine, give as good as one gets;

give/return like for like, give tit for tat, take an eye for an eye (and a tooth for a tooth)

informal get, give someone their comeuppance

British informal get one's own back on