During orthodontics, I talked with the doctor about the price of orthodontics and said that I would pull out four teeth. After I pulled out a tooth that day, I said there was an extra charge for pulling it out. The regular stomatological hospital should have told you all the expenses before doing it, and there are obvious records on how much money is receivable, how much money is paid and how much money is owed. This situation is fraud. You can sue him, and you should be able to get your money back before the treatment starts. Tooth extraction has little to do with correction. You can continue to make changes elsewhere without extra charge. It is best to go to a regular hospital to correct it. .