healthcare very bad for the sick

I have been going for my annual mammograms since 2022, i called the radiology department yesterday just to confirm if i went this year or late last year as i wasnt sure, as my medical aid only pays for one mammogram per year. so i just needed to make sure of this as i have an appointment with the breast specialist in a few days. the lady that answered the phone told me i could not have been there last year as their machine wasnt working all of last year. i then called my medical aid and they confirmed that i was there on the 24th of November 2023, i then called back to book an appointment, and i was told that they do not take appointments they only take walk in, between 9 and 13:00, i then called this morning just after 9 to confirm that i could walk in, when i got there a very grumpy person told me that i had to have an appointment for a mammogram, this after i left work and had to now to go back to work and then return at 11. this service is truly pathetic, especially when one is in pain and not in a good frame of mind. i then came back t work and called garden city wanting to speak to the hospital manager, i have on record on my work phone the number of times i have had to call back as the person/s they put me through to still has not answered my call/s. is this service okay from heatlhcare professionals? i feel as if i am at a government hospital.