"I called for over an hour"

I was feeling terrible and really dizzy after losing blood and had recently underwent a minor operation at Monklands hospital, I called my GP to ask for iron tablets as I have had to take them before in the past.  I was told to call the treatment room to arrange an appointment for bloods.  I called and called and called for over an hour but the line was constantly engaged (I understand the pressures that the health centre is under due to covid) but it would be better to at least have a recorded message or something.  

I called the main switchboard to ask if there was a problem with the telephone lines at the treatment room to which they replied that they were just really busy but I could be booked in there.  I was given an appointment for 4 days later at 12:45,  I repeated the time and date to be sure.  I attended today to be told it was at 11:45.  I asked is there anything they can do as I feel terrible and really needed this appointment and was met with a shrug.  They said that I could get an appointment at the end of the next week.  Not good.