My advice to you is to go offline for a few days, maybe even a week or two (unless you job demands that you be on the computer). It’s hard to do, but for more extreme addicts, it’s quite necessary.
Also, learn time what your “Danger zone” is (ie, what time of day are you most susceptible to porn use). For most people, it’s either late at night or very early in the morning. Then, what I’m now doing is working out at high intensity every other day so that I’m too tired to even consider relapsing.
Probably not very good advice for the long term, but so far it’s working for me.
We all are finding ways to curb our addictions, but to break a habit, you have to make a habit. Think of something you value just as much as porn, but something that has real rewards, and spend your time during the danger zone period focusing on that thing.
Me? My most enjoyable hobbies are - try not to laugh - working out, reading comic books, and gaming. Sure, not the best things to do in my free time, but they’re just as important to me as my addiction was, so I spend my time in the danger zone time of day binging on them, until I fall asleep. Still, I recommend more constructive hobbies, and yes, I have to follow my own advice.