"Impossible to get through and get an appointment"

I recently phoned up about pain in my foot coming back, it takes a long time to try and get through because either no one answers or the phones are always engaged, when I did managed to get through I told them about the pain coming back, but they didn't give me an appointment.

I received a letter shortly after saying that I had missed an appointment, of which I had no knowledge about, and that I would need to respond to this letter otherwise I would be discharged from the service.

This made me quite distressed because I was in quite a lot of pain with my foot.

Additionally when the information is dictated to the computer via voice to write up my letters or records, it makes no sense half of the time. It would be a jumbled sentence or even completely wrong information that then puts on my medical record.