I have only just seen your post and I completely understand your frustrations as my husband is in a care home and I am constantly explaining to so many different staff how they can help him better in the most basic care needs. I have written on this subject before on here and still find it difficult to get across to the powers that be the importance of good care for people with this very difficult condition.
I agree it is disgraceful that in this day and age people with Parkinson's have this constant struggle to very basic care, but as I have said before some care homes do not want people that need quite a lot of attention through no fault of their own and class people with Parkinson's as such people.
There needs to be many more care homes that can look after people with Neurological conditions and although I live near 4 large main hospitals my husband is an hour away from me and I know of at least six other people from my area who have relatives in this home for the same reason, it seems crazy that there are not local or regional care homes for these very complex conditions.
If you read my posts you will see some of the problems we have had over the last few years and I have to say I would have taken things further but don't for the very reason you have now, but I do keep trying to educate the care staff, its hard work and very draining and a bit like knocking your head on a brick wall but I do this in the hope that anyone coming after my husband will have a better time as well as his care improving once they have a better understanding and realise that their job would be so much easier if they only listen to both my husband and myself.
I have to say there is little will for change and the care home owners should be a lot more accountable for good training and enough experienced staff and not keep employing people who have never done care work being employed in complex need care homes as it is not fair to both resident or staff, most of the care staff at my husbands home are nice people but lack care experience and good training.
The whole care industry needs to be looked into and improved as well as a better career structure with the respect it deserves, after all they are the people looking after our relatives and even ourselves maybe one day.
Good luck with the CQC and maybe the PDS will take up your case, I hope so as it is so difficult doing this on your own.
Just a note to other forum members who know me my husband had a very successful operation and much to my relief he was a star patient very calm throughout and no challenging behaviour what a brave man he is.