I have purchased several Udemy courses through Letyshops. The price of the course has not increased for me, but it is true that the discount is never applied to me and I have to request it by hand. I've been waiting months for the first one and still nothing...
We're sorry you had such an experience with Udemy. We have already sent requests to our partners to investigate the reason for the loss of cashback and return it. As soon as they answer us, we will inform you immediately. We look forward to your understanding and patience.
The LetyShops team