Refund of million won reservation deposit refused. I guess you should never pay the reservation deposit carelessly.

I paid Jiheup's deposit and requested cancellation on the day of payment, but it was rejected. There are more than 3 weeks left until the surgery date, and the deposit of 1 million won is refused. It is not possible to contact the Sobo Center. In fact, the hospital is recommending that I file a complaint with the Sobo Center. The hospital initially said that it would be difficult to refund the reservation deposit because it was a discounted amount, but even if you report it to the Sobowon, they say it will not be possible because the hospital's regulations take priority. In this case, do you really not get a refund? I didn't do any blood tests or anything like that before surgery.
  First of all, it was filed with the Small and Medium Income Tax Agency and I requested help from the Legal Aid Corporation. Has anyone gone through the next steps for filing a complaint with the Small Legal Aid Center? It's a famous place in Gangnam, so I guess it's a pear.