Hello there,
We are sorry about your problem.
If it is a functional defect such as a headphone driver, we will define it as product damage. In this case, we will apply for a full refund for you after receiving and testing.
Therefore, according to our policy, if you want to return the product, you are responsible for the return shipping cost and 35% restocking fee(if the product packaging is opened).
It is our policy to generally not accept returned cables. However, since you did not open the package of the product, we specially applied for a return refund for you. But you need to bear the postage yourself. We will check after receiving the returned product and refund it for you after confirming that there is no problem.
We have been waiting to hear from you for a long time, if you still want to return the product for a refund please contact us again by email, we will be happy to help you.
Thank you for your support and understanding.