I'm not interested in a refund. I posted my experience so others can learn from my mistake. When make games with us was on HN I believed in your company and by the end I felt duped. Maybe things have changed but I would never give you guys a second chance.
Also, my experience is not unique. During the course many students voiced their frustration. Your site crashed the first day, content was posted late and the example code had bugs in it.
That was the time to offer refunds, privately, to every one of your customers. Not here, publicly, to one person exposing your company.