This is a bit ambiguous Blade for a couple of reasons...

1st the 2 month ban vs a perma which really has no rule of ref: 2month bans as it's way longer than any related punishment and way shorter than perma to which the closest rule is:

http://www.ibisgaming.com/forums/showthread.php?t=495

III. Perma bans

This is the highest punishment a player can receive. It can only be granted by a relatively small number of Upper Level Admins. Perma bans usually require a demo but always require that the player in question, beyond a reasonable doubt, committed an offense against the server and or community. Like any ban these can be applied but require a 2/3 majority vote from ALL upper level admins. If the ban appeal is denied it can NEVER be made again.
1) Violation of the following can result in perma ban without a demo. As long as there is substantial witnesses and physical log evidence
I.1
I.3
II.1
V.2.B.c
IX.3

2) Violation of the following when proved by demo
I
II
III.5 -Must have received an approved temp ban first
V.2.A
V.2.B.c
2nd - So, this is a difficult situation for us to make a determination or form an opinion because there is NO demo.

What were the details, I see none explained. Were there any other admins or IBIS members in the server?

Is there a demo available by anyone for verification and just cause for the ban? (not saying it was or wasn’t a proper or righteous ban on your part but by the same token the rights of the player(s) also have to be protected for the PR of IBIS credibility)

Can you provide the required details for the above or by the way the rules are written the ban should be lifted.