Complex sentence: He did more damage by saying that "there is no Kotiya in Sri Lanka" and misinterpritated "Panthera pardus kotiya" as "Diviya" in Sinhala.
Split into simpler sentences: He did more damage by saying that "there is no Kotiya in Sri Lanka". And then misinterpritated "Panthera pardus kotiya" as "Diviya" in Sinhala.