I am sorry, but I would like to ask if there is a way to recover a lost account... I remember that my nickname in game was Flegnaldo, a level 88 tank, Champion actually. But I lost my passowrd and e-mail

I remember, but not sure of it, that the user to log in was Fleg. Can someone help me or give me any instruction or a way to change the e-mail adress of this acount and next the password?