I feel like you guys are just trying to leech money from the players who have spent plenty of money in the consumption wheel. I also feel like you guys purposely do this just to get more money.
If you guys don't start fixing your bugs and errors. It's going to become problematic for both you and the players who pay MONEY(something you guys need or else the game will close). So, I advise you do tests on the exams before you add them into the game. People start feeling like they're getting cheated by you guys.