Email change error, ticket never answered


dont know if this is the place, my friend created account and register cs:dz insted of cs:go and when he want to connect cs:go he have error that the game is already in use, but he cant play with us in lobbie, he cant change his email (me neither) and he always get message contact the support and support is never answering the questions. So if someone would be kind to help he will proove by any way that he is the owner of the account, and he will give you any acces to his PC including remote screen view for help. This is his profile link so please help him