Unfortunately there are at least two conflicting sets of advice concerning the right diet for Type 2 diabetes:
--The "balanced diet" which includes all the major food groups, including carbohydrates. In the UK this is also called the "Eatwell" plate and is advocated by the NHS. So for instance, certain carbohydrates including wholewheat bread would be included in the diet.
--The "low carbohydrate" diet which is not officially advocated by the NHS, or health authorities here in the USA where I live. In this diet, any conventional breads (including whole wheat) would either be excluded or only eaten in very small quantities, and other major carbs such as potatos, rice, pasta, beer, fruits, milk, and certain vegetables, would be limited or eliminated. Note that this goes far beyond what we normally call "sugars" as "carbohydrates" includes a large spectrum of foods and drinks.
In my opinion, and the opinion of quite a few people on this forum, the "Eatwell" option (while healthy for non-diabetics) is unlikely to be sufficient to control Type 2 diabetes. I was already eating a version of the "Eatwell" plate for the past three decades and it did not prevent me from being diagnosed with T2 a year ago.
I was able to "reverse" my T2 (i.e. bring down my blood glucose to non-diabetic levels) solely with a low-carb diet. This "low-carb" option is not for everyone. In particular, those taking certain kinds of diabetes drugs should do it only with medical advice. It works only if you stick to it for the long term, i.e., for the rest of your life. It is a fairly extreme diet, although once you get used to it, you discover that there are many, many low-carb foods so there is plenty of variety.
Here are some useful links:
Explaining the HbA1c blood test:
http://www.diabetes.co.uk/what-is-hba1c.html
Explaining the various low-carb options:
http://www.diabetes.co.uk/diet/low-carb-diabetes-diet.html
Getting food information and recipes:
https://www.dietdoctor.com/low-carb
Edited to add: The confusion that you are experiencing, concerning diet is, unfortunately, typical and I remember it well from when I was first diagnosed. One of the books I bought back then even had the title "So what can I eat now?" (and was full of what turned out to be dubious advice).