Злом зла не поправишь

Acting wickedly to retaliate for the injury done to you will not improve matters. See Из зла добро не родится (И), Огонь огнем не погасишь (O), Чужой грех своего не искупит (4)

Cf: Can two wrongs make a right? (Br.). Evil does not cure evil (Br.). Never do evil for evil (Am.). Never do evil hoping that good will come of it (Am.). Two blacks do not make a white (Am., Br.), Two wrongs do not make a right (Am., Br.). You cannot fight evil with evil (Am.)