To change the data without the participation of the seller:
1) Steam > Account > Snap phone.
2) Connect the Steam Guard through the app on your phone.
3) Settings > Account > Edit contact address e-mail. mail.
3) Settings > Account > Change password.
Kindly requested after the authorization to use these instructions:
1) Settings > Account > Edit contact address e-mail.
2) Settings > Account > Change password.
It is strongly recommended to include Steam Guard, choose any convenient point of 3.1 and 3.2.
3) Settings> Account> Manage settings Steam Guard:
3.1) Get Steam Guard code from Steam application on my phone.
3.2) Get codes Steam Guard by email.
Any problems can be solved through correspondence with the seller!