Most people don't believe in IP-Bans, so it must be a Hardware Ban...
I don't know how to remove a Hardware Ban, but the reason for getting Banned could be that you still have Old (Detected) Hacks on your PC.
1- Find all Old Hacks and remove them completely.
2- Uninstall WarRock and remove all remaining Folders, then Download the Latest WarRock Installer.