Someone change E-mail from another account I have

What happened was the following, I haven't logged into the account for a long time, I was checking my accounts I put the ACCOUNTNAME and the PASSWORD and everything worked out, but then I asked for the two-factor code. I went to the email of my account, and I didn't receive anything... I wrote warmane in the search bar of the emails and some appeared there. when I went to see it, there was an account change email, but I didn't change anything, someone I don't know how it changed for me. If you can help me, I have access to the account name , password and I know what the old email is. The email also says what the new email is.
Sorry, for my English.

I await an answer, thank you very much.

open a general inquiry ticket here on site or send an email [email protected]
explain your situation, add all the info of proof of ownership of that account

on email i can send prints ? and say about my email and email other person ? and can say acount username and password ?