Hi Hana,
You could try another letter to that guy you got the reply from last time (the new head of the NHS?), stating that it appears that your local PCT, an unelected body, have taken it upon themselves to dictate what government health policy will be. Now that this is happening could he please explain what possible purpose there can be in voting at elections when the the policies of whoever gets in are over-ridden by people who are not answerable to the electorate.
And yes, please tell us which PCT this is.