My 5-year-old account is gone

My 5-year-old account is gone, here's the chronology:

1. On June 3, 2025, as usual, I opened callofwar.com (web browser) because I was in an intense battle

2. Strangely, it returned to the initial login interface and did not enter my usual profile account.

3. Then I entered the ID and Pass that I memorized and saved in Google Password Manager, so it was impossible for me to enter the wrong password.

4. However, what appeared was the sentence "invalid username or password"

5. Then I used the login option using Gmail

6. What appeared was a new user account with the default nickname newbie

7. I have not been able to access my account at all until now

often use High Command / Premium Account to support Call of War, I just hope my account comes back