Hi Beverley
That was a very quick decision!
I think they are saying that you have an aid (the raised toilet) - which now solves the 'issue' rather than recognising that you need assistance to manage your toilet needs. All you can do is say that you think the assessor was 'mistaken' and supervision from another person is a necessity, not a choice, and there is a high risk of sores, abscesses and hospital treatment without it.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems