Try intermittent fasting in combination with a low carb approach. It will take some getting used to mind you as your body is probably adapted to getting a constant feed of carbs throughout the day. I'm not recommending the Keto diet but a lower carb approach was the missing link for me. Years and years of struggling to lower my body fat cutting out breads pasta rice fruit juices worked wonders for me. A word of warning, do not be religious about it! This is the quickest way to make you quit.