"Not possible to make an appointment"

I have been unable to get an appointment to see my GP despite increasing pain which has left me in a situation where I am becoming more housebound and I am frightened I am losing my independence. When I spoke to a receptionist recently I was told that there were appointment slots that had been 'blocked' and no way to access them unless I rang on certain days at 8 am to try and get booked. To try and make another appointment was not possible. My son, who is a senior nurse, was utterly disgusted by this treatment and the way this surgery appears to ignore the needs of its patients to simply make an appointment. I am in my 80's and find it difficult to manage recently because of the pain. I just want to see my GP!!