Securing the account is your own responsibility, It is part of the user agreement you signed when you first created your account.
As I mentioned previously, your only option is to follow up with the in-game customer support to secure your account.
Please be advised that the Moderators of this Discord server are not affiliated with the in-game customer support team and are unable to assist with in-game account issues, other than to direct you to contact the in-game support team. We are not part of Tencent Games and we are not in the same building as the in-game customer support team. The customer service receives an enormous number of requests every day. It takes time to review all of them. We kindly ask for your patience and understanding while they get to your request.