What Sandorra meant in that case was that the admin team is not been responsible for you - sorry - stupidity of giving away your account information.
If someone is banned uses your account that will result in your account and GUIDs been banned, no matter if it was you or someone else. Your account got banned for it. You make a new account with a new CD-key but you as a person were banned at that point for banevading (of your friend) which then results in your new key and account been banned aswell for banevading (of the ban on your account).
To sum it up: Get the issue solved even before thinking about creating a new account. Anything else will get you banned.
Also: Don't add me as a friend, I cba to remove you once more.