Recently I heard of one person who had it suggested to him that every time he wanted to watch porn he went and did something physical, go for a walk, do some star jumps in the house if it was late at night, or just generally find some other way to distract your mind.
Maybe phoning the Sexual Health line might be beneficial. They may have some suggestions for you.
Do you find you have a certain time of day when you usually look at porn? If so, can you try to make yourself do something else instead.
Maybe if you find some kind of reward for not doing what you don't want to do might be beneficial as well.
We all seek ways to find enjoyment in life, try and consider other options that will provide you with a positive feeling in life.
All the best with that. Cheers from Dools