Congratulations you on your accomplishments. Keep up the good work. Now I have better understanding of your dilemma.
I can tell you what work for me. I gain over 100lb when I was active. Once I put down all the substances and I had some clean time under my belt. It was time to lose the weight.
Like you I tried cutting down on calories and exercise with no success. A friend from the rooms suggested that I try the Akins diet and low and behold in less then a year I was down to my normal weight.
There is a lot of information online on the Akins diet. Including there own web site. Before you start any diet you should consult with a doctor first. I did.
I hope this helps.
Stay strong.
Ivan