I have a LG G FLEX L23 au carrier but now that is dead by wrong ROM Plz help me.

I have a LG G FLEX L23 au carrier but now that is dead by wrong ROM installation. it had Jellybean but i hav install KK of defuse but it wont work and now not even going to recovery mode. only LG logo appear. when trying to instal stock rom with LG Flash Tool there was error that the phone change to D959 model the DLL not working.. but if i trying to install .kdz file of D959 then it was also failed.. please help me friends plz...