When you haven't reported for class, you will be asked to attend the class. You will be arranged by good teachers, and once the class is officially started, the teachers who give you lectures will be very water.
Even if the final IELTS score does not meet the requirements, according to the score protection agreement, you can reread it, that is, throw you into the same class and reread it. If your score hasn't been reached this time, it's over. Finally, the key is that the English ability has not improved, and the IELTS score has not been tested, which wastes valuable preparation time.
IELTS is a standardized test. Although certain test skills help to improve test scores, the most fundamental thing to improve IELTS scores is to improve ability. However, the teaching mode of observing classes is not to improve ability at all, but to cheat.