Wrong password after just changing my password

Hi everybody. So it's not my actual account, i have another one with all my games on it, and after trying to connect it said to me: "Wrong password" so i asked for a code to reset it, received it, typed my new password, got the confirmation message that it was changed, and everything was well.

Then i go back to the login screen, enter my ID, my password and, you guessed it, "wrong password."

So i send another security code to my email, receive it, change AGAIN my password and this time i make absolutely sure of what i'm typing, copy it in a document and the website tell me my password was changed.

I go back to the login screen, enter my ID, copy and past my ******* password, and guess what? Wrong password. What am i supposed to do in that case?