I want to answer that question in depth but I can't do that openly because I know April31 is watching this thread to try to figure out my next moves lol.
But to put things generally- In Korea, if you mediate- the clinic has to agree to, but things have changed in the last few years and if you're a foreigner, we DO have certain rights when it comes to mediation- one of my friends told me that clinics now have to agree to arbitrate in relation foreign patients. If you're dealing with a semi-ethical clinic, then you will have good results mediating.
If you do not have good results mediating you can always sue and win- if there was malpractice or an unfavorable outcome due to medical negligence or otherwise you do have a case that you can pursue if you deem it necessary, period.
In korea, their doctors are allowed to keep practicing even with a suspended license (for example: Dr. Oh at Regan- he is suspended and still doing "surgeries"), you should still take action against the the doctor(s) license you believe is botching surgeries because malpractice is malpractice and if someone is researching a particular doctor, they need to know if action has been taken against their license so they can make an informed decision on whether or not they want to proceed with having a surgery or being under that doctor's care, and so that ethical clinics have the chance to decide whether or not they want to hire that doctor to work for them. Some people write a review, but when it all comes down to it, you must also report the doctor for malpractice or they will keep botching patients, deceiving customers, providing poor service, and getting away with it (until karma or a higher power comes back to kick them in the azz), a lot of these doctors are going to end up jobless, and they're already economically distressed and falling behind on bills and so are the clinic owners because foreigners are actually starting to stand up for themselves and fight back; my friend in Korea told me that because of Covid some of the clinics are going to have to shut down forever/go bankrupt, and they are struggling and scrambling for money (nana clinic is actually ok because they don't rely on foreign money so much, but many Korean clinics are going downhill quickly and the worst of them are getting their karma for botching patients and unethical practices).
I think Singapore has more ethics advancement in the arena of ethics, malpractice, and accountability that Korea isn't up to par with so it's like comparing apples to oranges.
xx!