No, there are no logs for you to see, nor is there any way to contest the action. It was done by a Battle.net sysop that viewed the activities I mentioned above.
More than likely you weren't the one doing anything wrong as your account wasn't closed. The key in question has a history of a lot of activity by many accounts in Asia back in Nov 2008 at which time it received it's first disabling for using hack programs.
The D2 classic key can not be used again to play on Battle.net.
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