NTTGame Support Has Not Resolved My ICS OTP Access Issue

I am writing regarding an ongoing access problem with my Knight Online account through NTTGame.

I had not logged into my account for a long time and recently tried to access it again. However, I am unable to log in because of the ICS OTP verification system.

I originally created the account using an old phone number that I no longer use and that was permanently closed through my mobile carrier. I now use a different phone number. However, whenever I try to update my number through the ICS platform, the system continues to send the verification code only to my old number.

Because I no longer have access to that number, I cannot receive the SMS, complete the verification process, or register my new phone number.

My account contains years of gameplay progress, valuable in-game items, and purchases made with real money. Although the email address associated with the account remains active and fully accessible, the system relies exclusively on SMS verification through the old phone number and provides no alternative method, such as email verification or identity confirmation.

I have been submitting support requests to NTTGame almost every day for approximately three weeks and have explained the situation in detail. Unfortunately, I continue to receive the same standard response containing a link to general instructions. I have reviewed those instructions multiple times, but they do not provide a workable solution for my situation.

The support team has not taken any additional steps to assist me with updating my phone number, and my most recent request, Ticket #ugf-763-93267, was also closed without a resolution.

I respectfully request that NTTGame review the limitations of its ICS OTP verification system and provide an alternative verification method for users who can prove account ownership but no longer have access to their old registered phone number.

My account user ID is bolum3737son, and the registered email address is d************@gmail.com**. I am prepared to provide any additional account information, purchase records, identification documents, or other verification required to prove that I am the legitimate owner.

I request that my registered phone number be updated and that access to my Knight Online account be restored as soon as possible.

Please provide me with a clear written response explaining the verification steps required and the actions that will be taken to resolve this issue.