Hello Sheena,
I am sorry to hear about the additional stress you are facing. The one good thing is that even though you are having to go through a review so close to state retirement age if you don't agree with their decision, you had can go down the whole MR and Appeal route regardless of which side of your birthday you are, because it started whilst you were still officially a youngster.
The obvious benefit you might wish to explore is Pension Credit - that is a means tested benefit which you might be entitled to.
Wishing you a great retirement
Catherine
Nothing on this board constitutes legal advice - always consult a professional about specific problems