So first problem was he can′t login in the multiplayer, but he can login in gamesas.com.
After the renaming his account, he can login in the multiplayer, but now he can′t login in gamesas.com.
He want to buy the DLC, but he can′t cause he can′t login in gamesas.com to pay the DLC.
So what can he do?
For the Support his Account is Wrathbich.
Thanks for answer and keep the bad english, if you found some.