Hey Joseph, I'd say instead of focusing on 'stopping the addiction' and having your focus on the 'addiction' only, rather look at what is it that you are trying to escape/hide away from or evade confronting in your reality where you instead seek out a perceived point of relief or comfort such as porn as a way to 'cope' with your reality
Therefore try approaching it differently, instead of fighting the 'addiction' as such, rather write out and see for yourself what are the causes or points of origin that you've been avoiding to face, take responsibility, change or confront and so have resorted in porn or masturbation as an apparent 'comfort zone' in your life, which then becomes a 'problem' in itself, but it's more of a consequence of something else that you might be aware you have to work on and change and you haven't done that yet.
It will require your actual movement, decision and dedication to get to a point of stability within you around this, so in essence it all depends on you now whether you keep prolonging getting to tackle this point in your life or leave it 'floating around' which is then accordingly how you are choosing to live your current life/reality.
You can check out SOUL's videos
for support on this as well.