I am writing this again because the course review was made private. 1. The instructor's teaching skills are the worst. 2. I paid in advance during the discount period to follow the previous curriculum, but there was a period. Since there was no proper notice in advance, I could not attend the lecture and the period expired. Because of this, I could not follow the previous curriculum and listen to it properly. 3. Because of this, I requested the instructor to refund or extend the lecture because the instructor's previous curriculum that I had applied for through the Infraon customer center was not sufficiently notified in advance about the lecture period, but I was ignored because they said something that did not sound fair. 4. So I wrote a course review that included these complaints, but you made it private because you gave me 1 point. I hope you do not manage your ratings like this. Other students should know this too ^^ 5. The money is good, but please have a conscience. I think I did a good deed, and since you said I can't get a refund or extend it, I don't expect that, but please don't make the course review private. And I think it is problematic that you are arbitrarily making my course review private without my permission. If you make it private again, I will contact Inflearn Customer Center and protest. 6. Finally, I would like to add. If you truly consider yourself an instructor, you should be considerate so that people like me who purchased the course in advance during the discount period and ended the course without even taking it can take the course because there was not enough advance notice. If you are doing this because you want money, I have nothing to say, but if you consider yourself an instructor, please think about it from the perspective of a student. Are you kidding me by asking me to pay for a course I haven't even heard of? 7. As I write, I am writing again. I am adding this in case you think I should have looked into it carefully in advance. When I paid, Inflearn UI did not specify the course period on the payment page, so it was difficult for students to know the period. All there was was a small note on the right side of the course application saying "2 months, 3 months". And as the instructor knows, some of his lectures are unlimited and some have a course period, so I thought they were all unlimited and bought them when they were on sale. And I tried to listen to them when I had time, but some of them had already expired. You may not know this context, so I'm adding more information here. You asked me to pay to listen to them again, but I can't do that even if I die. That's why I gave this course review and a 1-star rating. I don't even want to call you an instructor. Some of the lectures you registered for had a course period, and I applied for all the lectures in the curriculum when the discount was applied, but the period wasn't clearly notified, so they expired and I couldn't take the lectures in the curriculum I had applied for before. Because of this, I asked you to refund or extend the course, but you refused without considering the student's position at all, and because of this, I couldn't take the course smoothly, so I gave you a 1-star rating. Don't make this course review private. There are people like me who don't know that some lectures have a deadline, so please don't make it private and stop only revealing your 5-star course reviews according to your own taste. If you have even a modicum of conscience.