Welcome to the forum Ravella and I am very sorry to hear about your situation. My father had an illostomy, so I have seen what you are going through close up so to speak. I know he had to be careful what he ate, but his diet was not as restricted as you say you have been told. He certainly still had wholemeal; porridge and vegetables, as long as he was careful as to the quantity. Of course he wasn't diabetic, so he did not have that to worry about. I would imagine your high carbohydrate diet is what has caused you T2, same as for me.
I would suggest trying different things/foods, see what effect they have on both your diabetes and your illostomy. My experience with dieticians match yours, utterly useless.
😡 I am afraid the only way you will control your diabetes is with controlling your carbohydrate intake, not just sugar. You really must get it under control, because the consequences otherwise do not bear thinking about. It can be done, I have gone from a level HbA1c of 95 last July to one of 43 in November, which is only borderline diabetic, which is nice. It has not been easy, but it is doable.
I would also suggest getting a meter to test your blood sugar with at your home, I have found in invaluable. They should be available on the NHS for free, but very rarely are. You can buy a relatively cheap one on Amazon:
https://www.amazon.co.uk/Codefree-G...51&sr=1-2-catcorr&keywords=blood+sugar+tester
Not too bad a price and it seems to be the cheapest. There are a couple of helpful books too, but I forget the links, perhaps someone else could oblige.
🙂
Above all, do not despair, you should not have to survive on just protein, that would be very boring!
😉🙂