This translates as:
Купил наушники Kraken x lite (Removed serial number for security purposes) на следующий день решил поменять их в магазине на  RAZER BLACKSHARK. Теперь не могу разобраться как первые наушники отвязать от аккаунта

Hello 22_KARATEL,

Please be informed that you cannot remove the device that was previously registered to your account. However, if you require further assistance, feel free to send me a PM, and let's continue our conversation in English so I can better understand your concerns. Have a great day!