Default cannot factory reset LG F160s Optimus LTE2

i have an LG optimus LTE2 F160s which is password locked which i have forgotten
when i access recovery using vol up+home+power i just get stock recovery with droid and red traingle
with no option to factory reset the phone
also tried to flash a kdz using kdz updater but always get stuck at following stage lparam=100 wparam =5000
tried through official lg tool also but there i get stuck at 10% always have tried after diabling lg modem in device manager also
but no success
thanks in advance to anyone who can help
regards