Thank you for your feedback. As the lecture pace may be fast for some students, we have repeatedly stated in the lecture introduction and at the beginning of the lecture that you should check the free part before purchasing and that refunds are possible in the early stages. We ask that you please, please check these instructions in the future. We will reflect your feedback in future lectures to create better content.

People who don't read things will never read them, no matter how big you write it.