Hello, Apologize you for letting you unhappy. But we have been very happy in the previous communication process, and we have communicated your needs before placing the order. We are also actively guiding you to use it after you receive the goods. It's just you may not use some settings of the machine well or adjust the parameters well, which leads to your feeling that the effect is not good later, but you can continue to ask us. We are happy to guide you and teach you how to use it. We can also provide online remote guidance if you have any in-depth questions. Thanks for your understanding. Have a nice day.