Product ID:
Subject: Mr
Content: HelloI bought your T9 product on September 24, 2022 in Amazon (order id: 404-1740461-5038738). The headphones have stopped working correctly. They were heard very well, but now they are heard very low. I have tried with several phones and the same thing happens. Putting the sound as high as possible, it is not heard well.Please, can you tell me the steps to process the guarantee?Thank you so much