Dana can definitely drop out of school during the training period. Deducting the expenses you spent during your study from the total tuition fee is the refundable tuition fee. Dana won't covet every student's money.
But Dana is a listed company after all, and there are standardized procedures for recording and refunding fees. Students need to bring their credentials to complete all procedures when paying fees, and Dana's accounting teacher will refund the fees, which may take about 3 days. If you don't understand, contact the class teacher and they will help you with the refund procedures. After completing the formalities, you can wait for the refund at home. Of course, this needs a process, so don't worry too much.