Use your willpower in a small burst to buy a low nicotine juice and literally throw away the high nicotine stuff. You need to actually toss it and never use it again. Yes, it costs money, but do you want to quit or not?
Now use the low nicotine juice for a set amount of time (say, a month) and then switch to zero nicotine juice. Try to keep the same flavors you’re used to already.
Eventually you will stop smoking because youre only getting the positive feelings from the habit itself and not the nicotine.