The doctor told you to stay away from refined sugar. That may be a place to start, but if your fasting blood sugar is as high as you've mentioned and just dropping refined sugar doesn't drop it much, you'll likely need to reduce a lot of other carbohydrates, too.
When I was diagnosed with diabetes in 2011, my FBG was 289 mg/dl (16 mmol/l in your units) and my A1c was 11.5. My doctor gave me a sample diet to follow. It didn't give a specific number of carbs, but it did suggest meals. Breakfast, for example, was 2 servings bread, 1 serving milk, 1 serving fruit, 1 serving protein. I followed that for two days - and each day my BG shot up to 548 (30.4 mmol/l). Needless to say, I scrapped that diet pronto. But you can see that carbs in "normal" foods like bread, milk, and fruit can also be a problem to a diabetic. For some more than others.
I suggest that you might use an online source of carbohydrate content information for the foods you are considering eating. I used the FitDay website when I started. I've noticed a lot of others seem to use Calorie King. I'm now on a moderate carb diet with 120-150 grams of carb most days.. But before I was put on insulin I had to eat far less than that.