Life Flora Clinic Roodepoort… why do I have to go to such lengths for this???

My father in law was recently hospitalised for his heart condition, which was confirmed prior to this with a CT scan. Note that he doesn’t have a medical aid. With this being said- the hospital required almost half a million payment straight up. No deposit, no down payment - you pay or leave. Business policy I guess. Quoted us on worst case scenario. First he was at the emergency room- I organised a private ambulance to take him to a hospital in Pretoria, as the staff on duty claimed his vitals were normal. They didn’t want to discharge him- said we have to sign him out. Why not discharge him if his vitals were normal? The ambulance was also not allowed to pick him up on the premises. After a huge fight, they didn’t leave us with a choice. We had to pay the price. Admitted and scheduled surgery the next day. Service from the doctors was excellent. Now - after demanding direct payment - I can’t even get an invoice or statement from them. Yet dad received 2 smses with the hospital and pharmacy (I presume) amounts- asking to settle. The nerve!! I called the accounts department twice, emailed the hospital 3 times with ALL the details (same lady that I sent the proof of payment to btw). My husband went to the hospital- they can’t even give him an invoice??? Sick and tired of begging. Yet we had to pay IMMEDIATELY!! How long is the refund going to take if I wait this long (21 days later) just for a detailed invoice??? Can I also demand IMMEDIATE payment like you? Did you know that (wherever that funds came from) we received interest? Are you willing to cover those expenses too? Did you know that it’s cash flow and that it takes money to make money? Are you going to cover those losses too? Didn’t think so. Instead you are earning the interest of our money in your bank account!!! I hope I NEVER EVER have to deal with you again!!!