Can not able to enter recovery mod topic

all the instruction are same.

1. press and hold the power button + volume down button at the same time.
2. when see the lg logo release them.
3. then push them again and hold (or hold only volume down button)
4. then I will enter in the recovery mod on lg g 2


but unfortunately this instruction did not working for my lg g2!

how will i do now?

i have put wrong knock code and then i need to put the backup code but unfortunately i have forgotten the code. there is no internet connection on the phone so Google recovery doesn't working. what can i do now?
still i am not able to enter recovery mod, so i am not able to hard reset