This situation depends on your financial ability. If the amount is really large, you can resort to judicial procedures. If it costs a few thousand yuan, spend money to buy a lesson. Appendiceal surgery is actually very simple. Apart from complications, there are basically no problems. It is a bit cheating to ask you to drain for 22 days (the purpose of drainage is to drain the wound accumulation and infection. As you said, draining for 22 days can be said to be serious. Inflammation and infection, your clinical manifestation is persistent high fever, which may even affect the central nervous system). You can refer to the normal appendicitis surgical procedure and then discuss it with the hospital based on the evidence.