Reocurring fissures

Hello, I would like to ask for an advice. I have been dealing with fissures for nearly 10 years. I am on lactulose and Miralax daily, have been doing dilatation for 4 years, but last year nothing is helping. The situation got worse after my second delivery. I had some minor pain so I visited my crs and during examination he tore me and I ended up with huge and super painful fissure. Tried Nifedipine, Rectogesic dilatation and PT and botox in the end. It helped a little but since then I had super tight anal sphincter and even thought I healed up, I still have some muscle pain and occasional tearing. Yesterday I visited another CRS for help and ended up with another painful fissure after anoscopy. Even thought I am doing dilatation with finger every day, simple digital examination hurt me. I really do not know what to do. Do you think that LIS could be a solution? Because I would reather live with colostomy bag. In my country, lis is not prefered procedure but I cant handle it anymore. Does anyone have similar experience? Thank you