Over charged medical bill

I recently visited Cape Gate Medi-Clinic and had an extremely bad experience. This is the 3rd time I've been there of which only this experience was in a total different ballpark than the previous two visits. I had ripped of my right-hand pinky nail of the nail bed, which was only attached at the cuticle. Thinking that the nail would have to be removed, I went to the ER round about 18h20, Monday, 10/10/2022. I waited a little over two hours before I was seen by the nurse, who only took my temperature, blood pressure and asked me what my reason for visit was (I don't know his name, as he never introduce himself, nor did he wear a name badge). Another 30-odd minutes later, the doctor called me (cannot remember his name), who briefly inspected the nail and went to another doctor for a second opinion of whether the nail should be removed or not - he didn't want to further damage the nail bed (I appreciate that). A few moments later he came back and confirmed that it is not necessary to remove the nail. He cleaned it with salt water, app**** a steri-strip and gauze tape. Now here comes the problem, I was billed R1579-00 for a plaster. My GP, who's consultations are around R550-00, could've done that for me at a much lower cost, but unfortunately this happened after hours, forcing me to visit the ER. The lady at the reception had me sign a receipt stating that the bill would be submitted to my medical aid and only after I signed, she mentioned that any charges not covered by the medical aid, I would be liable for. The liability I understand, but that should be mentioned before signing. I feel that I was way over-charged for a plaster and 3 hours of my time wasted! No where could I find an email to explain my query, frustration and bad experience, so here we are. I would like to have the charges re-evaluated and be charged accordingly. A temperature check, second opinion and plaster CANNOT cost R1579-00. This is ridiculous! I previously spent 4 days and 4 nights at the same hospital (also admitted via ER) for a very critical matter and was charged a little over R12 000-00, which is totally understandable, seeing that I had my own room with an on suite and the length of the stay. But for R1579-00 for a plaster, oh no. I should've stayed at home and DIY! I am very disappointed.