Hi OP
Stuff like this brings back floods of memeory etc
Really feeling for you
When I was diagnosed with a cancer, me and my OH had to be pro-active. That is not push our way up the waiting lists but ensure and help the hospital so no appointments were lost in the post and no appointments were over-looked.
I find and this is my personal experience that often, not always when one HCP says "no" they all say "no."
I did not trust the hospitals not because the staff are not good, but human error and the odd staff that may not be aware of correct procedures.
I checked my appointments, I rang to confirm, I insited I got my letters of appointment and ensured my contact details were all accurate and we were ready to come with an hours notice. When I had cancer removed,, I felt I needed extra prepvatitive treatment and was told a blut no by what I deemed as a slightly uncaring doc. However, I went to our gp surgery, they were helpful and got me further tests and checked and though I did not get extra treatment, it did result in the monitoring to be be more frequent which helped and this was as per recommendations by NICE
Its good to have private health car insurance or ability to pay and not everyone can afford that and as you get older and have other medicals the insurance is not cost-viable.
Therefore, if unwell, remain polite and calm even in the face of some not so caring IMO HCP (99% are IMO,contacts) and state your case/concerns keep them concise and insist timescales approc timescales and closer to the time if not contact, call them, charge the,
Re other appointments I've been double booked and would not have noted that if it had not been for my recent NHS app. as I only got letter from one. So I spent over half and houri trying to get through to cocnel the duplicate appt so someone else could have it
OP, I know none of the above will help you dear OH but I hope it helps others and I wish you comfort .